:Center for Immigration Studies

The CIS was founded by Otis L. Graham and John Tanton. The organization was founded in 1985 as a spin-off from the Federation for American Immigration Reform and is one of a number of anti-immigration organizations founded by Tanton, along with FAIR and NumbersUSA. Otis L. Graham, professor emeritus of history at the University of California, Santa Barbara was the founding chairman of CIS, and later a founding board member.Staff (ndg) [https://cis.org/Graham "Otis L. Graham Jr."] Center for Immigration Studies website John Tanton, an ophthalmologist, eugenicist, and white nationalist, was instrumental in its founding.DeParle, Jason (April 17, 2011 [https://www.nytimes.com/2011/04/17/us/17immig.html "The Anti-Immigration Crusader"] The New York TimesSherman, Amy (March 22, 2017) [https://www.politifact.com/florida/article/2017/mar/22/center-immigration-studies-hate-group-southern-pov/ "Is the Center for Immigration Studies a hate group, as the Southern Poverty Law Center says?"] PolitiFact{{Cite news|url=https://thehill.com/latino/328571-dhs-hires-incense-immigration-supporters/|title=DHS hires incense immigration supporters|last=Master|first=Cyra|date=April 12, 2017|work=The Hill |access-date=April 12, 2017}}{{cite journal|first1=Joshua|last1=Woods|first2=Jason|last2=Manning|first3=Jacob|last3=Matz|title=The Impression Management Tactics of an Immigration Think Tank|journal=Sociological Focus|date=2 October 2015|issn=0038-0237|pages=354–372|volume=48|issue=4|doi=10.1080/00380237.2015.1064852|s2cid=157399186}}{{Cite news|url=https://www.splcenter.org/hatewatch/2017/01/23/former-executive-director-anti-immigrant-hate-group-fair-joins-trump-administration|title=Former Executive Director of Anti-Immigrant Hate Group FAIR Joins Trump Administration|publisher=Southern Poverty Law Center|access-date=2018-03-13|language=en}}{{Cite magazine|url=https://www.wired.com/2017/01/fake-think-tanks-fuel-fake-news-presidents-tweets/|title=Fake Think Takes Fuel Fake News|last=Ellis|first=Emma|date=January 14, 2017|magazine=Wired|access-date=March 13, 2018}} The CIS began as the research arm of the Federation for American Immigration Reform (FAIR), and became a separate entity in 1986.{{cite news |last1=Kulish |first1=Nicholas |last2=McIntire |first2=Mike |title=Why an Heiress Spent Her Fortune Trying to Keep Immigrants Out |url=https://www.nytimes.com/2019/08/14/us/anti-immigration-cordelia-scaife-may.html |access-date=19 August 2019 |work=The New York Times |date=August 14, 2019}} According to immigration historian Carly Goodman, Tanton created CIS as a separate entity from FAIR so that they could produce research that had a greater appearance of objectivity.{{cite news |last1=Goodman |first1=Carly |title=John Tanton has died. He made America less open to immigrants — and more open to Trump. |url=https://www.washingtonpost.com/outlook/2019/07/18/john-tanton-has-died-how-he-made-america-less-open-immigrants-more-open-trump/ |access-date=19 August 2019 |newspaper=The Washington Post |date=July 18, 2019}}

CIS does not provide information about sources of funding. The Colcom Foundation, a prominent supporter of the immigration control movement in the United States,{{Cite web |title=Pittsburgh's Colcom Foundation plays major role in immigration-control debate |url=https://www.post-gazette.com/news/environment/2015/02/15/Pittsburgh-s-Colcom-Foundation-plays-major-role-in-immigration-control-debate/stories/201502150072 |access-date=2025-03-19 |website=Pittsburgh Post-Gazette |language=en}} has been identified as one of its main funders.{{Cite news|url=http://www.politifact.com/florida/article/2017/mar/22/center-immigration-studies-hate-group-southern-pov/|title=Is the Center for Immigration Studies a 'hate group' ?|last=Sherman|first=Amy|date=March 22, 2017|publisher=PolitiFact Florida|access-date=April 6, 2018|language=en}}

CIS has been described as conservative,{{Cite web|url=http://www.factcheck.org/2009/04/cost-of-illegal-immigrants/|title=Cost of Illegal Immigrants|last=Bank|first=Justin|date=April 6, 2009|website=www.factcheck.org|language=en-US|access-date=March 7, 2017}}{{Cite news|url=https://www.reuters.com/article/us-usa-trump-immigration-lawsuit-idUSKBN15C0JP|title=Two Iraqis lead legal fight against Trump order blocking entry|last=Rosenberg|first=Mica|date=January 29, 2017|work=Reuters|access-date=March 7, 2017}}{{Cite news|url=https://www.npr.org/templates/story/story.php?storyId=128008414|title=Center For Immigration Studies Wary Of Dream Act|last=Cox|first=Tony|date=June 22, 2010|publisher=NPR |access-date=March 7, 2017|language=en}}{{cite web|url=https://thehill.com/homenews/house/206281-released-criminals-become-gops-new-weapon-in-immigration-fight/|title=GOP's new immigration weapon|first=Ian|last=Swanson|date=May 16, 2014|website=thehill.com}} a label rejected by the organization.{{cite book|last1=Graham|first1=Jr|title=Immigration Reform and America's Unchosen Future|publisher=AuthorHouse|isbn=978-1-4389-0996-7|page=[https://archive.org/details/isbn_9781438909967/page/407 407]|url=https://archive.org/details/isbn_9781438909967|url-access=registration|language=en|year=2008}} After an NPR story described CIS as "decidedly right-wing", Edward Schumacher-Matos, the then ombudsman of NPR, argued that this mislabelled CIS, noting the organization's "political diversity".{{cite news|last1=Schumacher-Matos|first1=Edward|title=Getting The Bedfellows Of Immigration Policy Right|url=https://www.npr.org/sections/ombudsman/2013/07/29/206713906/getting-the-bedfellows-of-immigration-policy-right|publisher=NPR}}

CIS influenced the Trump 2016 campaign and Trump administration's rhetoric on immigration. Trump's first national general election advertisement cited CIS.{{Cite web|url=https://www.mediaite.com/online/head-of-trump-favored-anti-immigration-group-confronted-over-promoting-white-nationalist-website/|title=Head of Trump Favored Anti-Immigration Group Confronted Over Promoting 'White Nationalist' Website|date=2019-02-20|website=Mediaite|language=en|access-date=2020-01-17}}

In 2017, CIS analyst Jon Feere joined the Immigration and Customs Enforcement of the Trump administration. In his writings for CIS, Feere had claimed that giving birth on U.S. soil gives immigrants access to welfare and other social benefits, and that this gives rise to "birth tourism" (the practice of foreigners traveling to the United States to give birth to U.S. citizens).{{Cite web|url=http://www.cnn.com/2017/04/11/politics/trump-administration-immigration-advisers/index.html|title=Hard-line anti-illegal immigration advocates hired at 2 federal agencies|author=Maria Santana|website=CNN|date=April 12, 2017|access-date=April 12, 2017}} CNN wrote that "Politifact has mostly debunked those claims, concluding that US-born children do little in the long term to help their immigrant parents. Citizen children cannot sponsor their parents for citizenship until the young person turns 21 and any social benefits would be given to the child and not their undocumented parents, who do not qualify. The Pew Research Center also has found that the number of babies born to unauthorized immigrants in the United States has been declining steadily in recent years."

In September 2017, the Trump administration defended its claim that Deferred Action for Childhood Arrivals (DACA) "denied jobs to hundreds of thousands of Americans by allowing those same illegal aliens to take those jobs" by citing editorials written by members of the Center for Immigration Studies.{{Cite news|url=http://www.politifact.com/truth-o-meter/article/2017/sep/05/fact-checking-attorney-general-jeff-sessions-remar/|title=Jeff Sessions remarks on DACA, fact-checked|last=Jacobson|first=Louis|publisher=PolitiFact|access-date=September 17, 2017|language=en}} However, economists consulted by PolitiFact rejected the claim, noting that the job market is not fixed or zero-sum.

In May 2018, President Trump nominated Ronald Mortensen, a CIS fellow, as Assistant Secretary of State for the Bureau of Population, Refugees, and Migration, a top state department position overseeing refugee resettlement. Mortensen had been a vocal critic of illegal immigration.{{Cite news |last=Da Silva |first=Chantal |author-link=Chantal Da Silva |date=May 25, 2018 |title=Donald Trump has nominated an immigration hard-liner for a post dealing with refugees |language=en |work=Newsweek |url=https://www.newsweek.com/who-ronald-mortensen-trump-nominates-immigration-hardliner-post-dealing-944180 |access-date=August 30, 2018}}

In March 2019, CIS fellow Todd Bensman claimed that female migrants were given free elective laser eye surgery in detention centers, and that their children were given free braces.{{Cite web|url=https://www.oregonlive.com/politics/2019/03/ap-fact-check-free-lasik-offered-at-migrant-detention-centers-nope.html|title=AP Fact Check: Free Lasik offered at migrant detention centers? Nope.|agency=Associated Press|date=2019-03-08|website=oregonlive.com|language=en-US|access-date=2019-07-02}} The Associated Press found the claims to be false.

{{Conservatism US|expanded=other organizations}}

The Center for Immigration Studies supports lower levels of legal immigration{{Cite web|url=https://www.politico.com/newsletters/morning-shift/2018/09/24/trump-bets-on-public-charge-349226|title=Trump bets on public charge|website=Politico|language=en|access-date=September 28, 2018}}{{Cite news|url=https://www.nytimes.com/2018/09/22/us/politics/immigrants-green-card-public-aid.html|title=Trump Administration Aims to Sharply Restrict New Green Cards for Those on Public Aid|work=The New York Times |date=September 22, 2018 |access-date=September 28, 2018|language=en|last1=Shear |first1=Michael D. |last2=Baumgaertner |first2=Emily }} and stricter enforcement measures against illegal immigration.{{Cite web|url=http://www.latimes.com/nation/la-na-undocumented-immigrants-20180921-story.html|title=Number of immigrants in U.S. illegally could be double the widely accepted estimates, study suggests |last=Etehad|first=Melissa|website=Los Angeles Times|date=September 23, 2018 |access-date=September 28, 2018}}

In 2018, CIS defended the Trump administration's decision to separate undocumented immigrant children from their parents.{{Cite news |last=Da Silva |first=Chantal |author-link=Chantal Da Silva |date=June 5, 2018 |title=ICE's director is set to speak at an "anti-immigrant hate group," event, the SPLC says |language=en |work=Newsweek |url=http://www.newsweek.com/center-immigration-studies-ice-head-thomas-homan-criticized-addressing-957886 |access-date=June 6, 2018}} CIS argued that the policy deterred immigrant families from crossing the US border and said that the policy "actually protects foreign nationals." At a June 2018 event hosted at CIS, outgoing acting director of Immigration and Customs Enforcement, Thomas Homan, defended the policy.[https://time.com/5301764/tom-homan-immigration-ice-family-separation/ Immigration and Customs Enforcement Director Defends Separating Families at the Border], Time, Maya Rhodan, June 5, 2018. Retrieved June 6, 2018.

CIS opposes sanctuary cities, which are jurisdictions which limit cooperation with federal immigrant enforcement agencies or prioritize law enforcement resources for other things than immigration enforcement.{{Cite web|url=https://www.wral.com/fact-check-linda-coleman-and-sanctuary-cities/17919446/|title=Fact Check: Linda Coleman and sanctuary cities|last=WRAL|date=2018-10-22|website=WRAL.com|language=en|access-date=2019-07-02}}{{Cite web|url=https://www.huffpost.com/entry/senate-republicans-sanctuary-cities_n_56265805e4b08589ef48f859|title=Senate Republicans Fail In Push To Punish 'Sanctuary Cities'|last=Foley|first=Elise|date=2015-10-20|website=HuffPost|language=en|access-date=2019-07-02}}

CIS seeks an end to "Optional Practical Training" work permits, which foreign students who attend American universities can use to obtain internships.{{Cite web|url=https://www.denverpost.com/2019/06/18/h-1b-visa-opt-work-permit-delays-internships/|title=H-1B visa: Amid OPT work permit delays, foreign students reportedly losing internship opportunities|date=2019-06-19|website=The Denver Post|language=en-US|access-date=2019-07-02}}

CIS publishes research and analysis of immigration data.{{Cite web |title=Center for Immigration Studies |url=https://www.annenbergclassroom.org/resource/center-immigration-studies/#:~:text=The%20Center%20for%20Immigration%20Studies,point%20of%20view%20on%20immigration. |access-date=2025-03-19 |website=Annenberg Classroom |language=en-US}} The organization's publications address topics relating to both illegal and legal immigration.

CIS is a member of the advisory board of Project 2025,{{Cite web |title=Advisory Board |url=https://www.project2025.org/about/advisory-board/ |url-status=live |archive-url=https://web.archive.org/web/20231119034220/https://www.project2025.org/about/advisory-board/ |archive-date=November 19, 2023 |access-date=July 8, 2024 |publisher=The Heritage Foundation}} a collection of conservative and right-wing policy proposals from the Heritage Foundation to reshape the United States federal government and consolidate executive power should the Republican nominee win the 2024 presidential election.{{Cite news |last=Mascaro |first=Lisa |date=August 29, 2023 |title=Conservative Groups Draw Up Plan to Dismantle the US Government and Replace It with Trump's Vision |url=https://apnews.com/article/election-2024-conservatives-trump-heritage-857eb794e505f1c6710eb03fd5b58981 |url-status=live |archive-url=https://web.archive.org/web/20230922112031/https://apnews.com/article/election-2024-conservatives-trump-heritage-857eb794e505f1c6710eb03fd5b58981 |archive-date=September 22, 2023 |access-date=July 8, 2024 |work=Associated Press News}}

The Southern Poverty Law Center (SPLC) published reports in 2002{{cite web|url=http://www.splcenter.org/get-informed/intelligence-report/browse-all-issues/2002/summer/the-puppeteer|title=John Tanton is the Mastermind Behind the Organized Anti-Immigration Movement|website=splcenter.org}} and 2009Beirich, Heidi. [http://www.splcenter.org/sites/default/files/legacy/pdf/static/splc_nativistlobby_022009.pdf The Nativist Lobby] {{webarchive |url=https://web.archive.org/web/20110708002442/http://www.splcenter.org/sites/default/files/legacy/pdf/static/splc_nativistlobby_022009.pdf |date=July 8, 2011 }}. Southern Poverty Law Center. on John Tanton, who founded CIS. Tanton is a retired Michigan ophthalmologist who opposed immigration on racial grounds, desired a white ethnic majority in the United States and advocated for eugenics.{{Cite web|url=http://www.cnn.com/2017/04/11/politics/trump-administration-immigration-advisers/index.html|title=Hard-line anti-illegal immigration advocates hired at 2 federal agencies|last=Santana|first=Maria |website=CNN.com|date=April 12, 2017|access-date=April 12, 2017}}{{Cite news|url=https://www.nytimes.com/2011/04/17/us/17immig.html?pagewanted=all|title=The Anti-Immigration Crusader|last=DeParle|first=Jason|date=April 17, 2011|work=The New York Times|access-date=March 13, 2018|language=en-US|issn=0362-4331}} The SPLC's 2009 report charged that "FAIR, CIS and NumbersUSA are all part of a network of restrictionist organizations conceived and created by John Tanton" who they said had "deeply racist" views, and said that the group had "frequently manipulated data" in order to promote anti-immigration goals.

In a response in the National Review, Krikorian called the SPLC's report "hackwork", and pointed to members of the CIS board who were involved with civil rights organizations as evidence that the group was not a hate group.{{cite news |last1=Krikorian |first1=Mark |title=Free Speech Is Great, But ... |url=https://www.nationalreview.com/2009/02/free-speech-great-mark-krikorian/ |access-date=19 August 2019 |work=National Review |date=February 11, 2009}} Tanton also denied the SPLC's accusations. As to his alleged influence at CIS, he wrote, "I also helped raise a grant in 1985 for the Center for Immigration Studies, but I have played no role in the Center's growth or development."Tanton, John. [http://www.thesocialcontract.com/answering_our_critics/puppeteer.html "SPLC's MO: Audacter calumniare semper aliquid haeret (slander boldly, something always sticks)"]. The Social Contract. Spring 2010.{{Cite news|url=https://thehill.com/blogs/blog-briefing-room/news/271189-liberal-report-links-immigration-groups-to-white-nationalism/|title=Liberal report links immigration groups to white nationalism|last=Weaver|first=Dustin|date=February 29, 2016|work=The Hill|access-date=August 16, 2018|language=en}} According to CNN, Tanton openly embraced eugenics. The New York Times noted that Tanton made his case against immigration in racial terms.{{Cite news|url=https://www.nytimes.com/2011/04/17/us/17immig.html|title=The Anti-Immigration Crusader|last=DeParle|first=Jason|date=April 17, 2011|work=The New York Times|access-date=April 12, 2017|issn=0362-4331}} CIS has consequently been criticized for its reluctance to criticize Tanton and his views.

In 2004, a Wall Street Journal editorial repeated the SPLC's allegation that CIS is part of a network of organizations founded by Tanton and also charged that these organizations are "trying to stop immigration to the U.S." It quoted Chris Cannon, at the time a Republican U.S. representative from Utah, as saying, "Tanton set up groups like CIS and FAIR to take an analytical approach to immigration from a Republican point of view so that they can give cover to Republicans who oppose immigration for other reasons."{{citation|title=Borderline Republicans|work=The Wall Street Journal|date=June 14, 2004|page= A18|url=https://www.wsj.com/articles/SB108742681731539433}}

Several months earlier, Krikorian denied allegations made in a similarly critical The Wall Street Journal editorial{{citation|author=Riley, Jason L.|title=GOP Nativists Tarnish Reagan's 'Shining City'|work=The Wall Street Journal|date=March 15, 2004|url=https://www.wsj.com/articles/SB107931059351255105}} and by Representative Cannon, writing "This kind of venomous lying and guilt by association are par for the course in the fever swamps of the web, but are startling in the halls of the U.S. Congress and the pages of the nation's largest-circulation newspaper."Krikorian, Mark. [http://www.nationalreview.com/articles/271137/strange-bedfellows-mark-krikorian "Strange Bedfellows"]. National Review Online. March 31, 2004. Although former Representative Cannon expressed a negative view of CIS, the CIS website quotes other elected officials, including U.S. Representative Lamar S. Smith (R-TX), former Governor Richard D. Lamm (D-CO), U.S. Senator Jeff Sessions (R-AL), and former U.S. Senator Alan Simpson (R-WY), in support of the organization.{{cite web|url=http://www.cis.org/About|title=About the Center for Immigration Studies|website=Center for Immigration Studies|date=March 19, 2008 }}

In 2016, the SPLC began describing CIS as an anti-immigrant hate group. It cited CIS's repeated publication of white nationalist and anti-Semitic writers, its employment of an analyst known to promote racist pseudoscience, its association with John Tanton, and its record of publishing reports that it said hyped the criminality of immigrants.{{cite web |title=Center for Immigration Studies |url=https://www.splcenter.org/fighting-hate/extremist-files/group/center-immigration-studies |website=Southern Poverty Law Center |access-date=November 29, 2018 |language=en}} In 2019, CIS sued the SPLC over the hate group designation in a RICO lawsuit, alleging that the designation was false and part of a "smear campaign".{{Cite news |last=Bixby |first=Scott |date=January 16, 2019 |title=Anti-Immigration Group Uses Mafia Law to Attack SPLC |url=https://www.thedailybeast.com/anti-immigration-group-files-rico-suit-against-southern-poverty-law-center-over-hate-group-label |access-date=February 20, 2019 |language=en}} Notre Dame Law School professor G. Robert Blakey, the author of the 1970 RICO statute, described CIS's filing as "not too thoughtful" and said its legal claims lacked merit. The SPLC described the suit as an attempt to suppress their right to free speech.{{cite news |last1=Bixby |first1=Scott |title=Anti-Immigration Group Uses Mafia Law to Attack SPLC |url=https://www.thedailybeast.com/anti-immigration-group-files-rico-suit-against-southern-poverty-law-center-over-hate-group-label |access-date=February 20, 2019 |work=The Daily Beast |date=January 16, 2019 |language=en}} The lawsuit was dismissed in September 2019 by Judge Amy Berman Jackson for failure to state a claim.U.S. District Court for the District of Columbia (September 13, 2019) [https://www.usatoday.com/documents/6409318-Memorandum-Opinion/ "Memorandum & Opinion"]

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The Center for Immigration Studies has been criticized for publishing a number of reports deemed to be false or misleading and using poor methodology by scholars on immigration, such as the authors of the National Academies of Sciences 2016 report on immigration; by think tanks such as the Center on Budget and Policy Priorities, the Cato Institute,{{Cite news|url=http://www.computerworld.com/article/2512386/data-privacy/real-id-alive-and-kicking--report-says.html|title=Real ID alive and kicking, report says|last=Vijayan|first=Jaikumar|work=Computerworld|access-date=March 29, 2017|language=en}} Urban Institute{{Cite web|url=http://webarchive.urban.org/publications/900621.html|title=The Decline in Medicaid Use by Noncitizens since Welfare Reform|last=Wang|first=Marie|date=May 21, 2003|website=Urban Institute}} and Center for American Progress; fact-checkers such as FactCheck.Org, PolitiFact,{{cite web|accessdate=2021-06-12|title=Fact-Checking the First Night of the Republican National Convention|url=https://www.nbcnews.com/politics/2016-election/fact-checking-first-night-republican-national-convention-n612081|website=NBC News|date=July 19, 2016 }} Washington Post, Snopes and NBC News; and by other immigration-research organizations (such as Migration Policy Institute and the Immigration Policy Center).{{cite news|last1=Dickson|first1=Caitlin|title=Inside The Center For Immigration Studies, The Immigration False-Fact Think Tank|url=http://www.thedailybeast.com/articles/2014/05/15/inside-the-center-for-immigration-studies-the-immigration-false-fact-think-tank.html|work=The Daily Beast|date=May 15, 2014}}

A March 2003 CIS report said that between 1996 and 2001 welfare use by immigrant-headed households had increased and that "welfare use rates for immigrants and natives are essentially back to where they were in 1996 when welfare reform was passed." The Center on Budget and Policy Priorities said this was misleading because the U.S. children of noncitizens "account[ed] for all of the increase in Medicaid or SCHIP participation among U.S. citizens living in low-income households headed by noncitizens."{{Cite web|url=http://www.cbpp.org/archives/4-14-03wel.htm|title=Noncitizens' Use Of Public Benefits Has Declined Since 1996, Revised 4/21/03|last=Ku|first=Leighton|date=April 21, 2003|website=www.cbpp.org|access-date=February 3, 2017}}

In March 2007, CIS issued a report saying that the "proportion of immigrant-headed households using at least one major welfare program is 33 percent, compared to 19 percent for native households."{{cite web|url=http://cis.org/immigrants_profile_2007|title=Immigrants in the United States, 2007|last=Camarota|first=Steven A.|date=July 25, 2012|website=Center for Immigration Studies|language=en}} Wayne A. Cornelius of the Center for Comparative Immigration Studies at UCSD, wrote that this was misleading because "once 'welfare usage' is disaggregated, as Camarota does in a table near the end of his report, we see that food assistance is the only category in which there is a significant difference between immigrant- and native-headed households. Immigrants are significantly less likely than natives to use Medicaid, and they use subsidized housing and cash assistance programs at about the same (low) rate as natives."{{Cite news|url=http://www.sandiegouniontribune.com/sdut-immigration-study-misleading-negative-2007dec16-story.html|title=Immigration study misleading, negative|last=Commentary|first=Wayne A. Cornelius|newspaper=sandiegouniontribune.com|access-date=February 3, 2017|language=en-US}}

In September 2011, CIS published a report Who Benefited from Job Growth In Texas? saying that, in the period 2007–2011, immigrants (legal and illegal) had taken 81% of newly created jobs in the state.{{cite web|url=http://cis.org/immigrants-filled-most-new-jobs-in-Texas|title=Who Benefited from Job Growth In Texas?|last=Camarota|first=Steven A.|date=August 7, 2012|website=Center for Immigration Studies|language=en}} According to Jeffrey S. Passel, senior demographer for the Pew Hispanic Center, "there are lots of methodological problems with the CIS study, mainly having to do with the limitations of small sample sizes and the fact that the estimates are determined by taking differences of differences based on small sample sizes."{{cite web|url=http://www.politifact.com/truth-o-meter/statements/2011/oct/19/mitt-romney/mitt-romney-hits-rick-perry-saying-40-percent-texa/|title=Mitt Romney hits Rick Perry, saying 40 percent of Texas job growth went to illegal immigrants|last=Jacobson|first=Louis|date=October 19, 2011|website=PolitiFact. politifact.com|language=en|access-date=August 11, 2018}} Chuck DeVore, a conservative at the Texas Public Policy Foundation, criticized the report, saying that it "relied on flawed methodology."{{cite web|url=http://www.texaspolicy.com/pdf/2011-10-PB45-TexasModel-WhoReallyGetsTexasJobs-CFP-ChuckDeVore.pdf|title=Who Really Gets Texas Jobs|last=Devore|first=Chuck|date=October 2011|work=The Texas Model: A Texas Public Policy Foundation Publication|publisher=Texas Public Policy Foundation. texaspolicy.com|archive-url=https://web.archive.org/web/20120601092357/http://www.texaspolicy.com/pdf/2011-10-PB45-TexasModel-WhoReallyGetsTexasJobs-CFP-ChuckDeVore.pdf|archive-date=June 1, 2012|url-status=dead|access-date=August 11, 2018}} CIS subsequently replied to DeVore's criticism.{{cite web|url=http://www.nationalreview.com/corner/279678/response-chuck-devore-texas-immigration-mark-krikorian|title=Response to Chuck DeVore on Texas Immigration|last=Krikorian|first=Mark|date=October 10, 2011|website=National Review|language=en}} The report was subsequently cited by Mitt Romney and David Frum. Politifact, when evaluating Frum and Romney's statements, noted that CIS's report "does acknowledge that 'no estimate of illegal immigration is exact'. But the methodological shortcomings also weaken the certainty of Romney's statistic. On balance, we think that both the report's authors and its critics have reasonable points. In the big picture, we agree with Chuck DeVore – a conservative critic of the study – that 'trying to draw conclusions about immigration and employment in Texas in isolation from other factors is problematic at best.' But we also agree with Mark Krikorian, the Center for Immigration Studies' executive director, that 'even if DeVore prefers a net-to-net comparison, immigrants still got a disproportionate share of new jobs'."{{cite web|url=http://www.politifact.com/texas/statements/2011/dec/02/david-frum/david-frum-says-foreign-born-individuals-filled-80/|title=David Frum says foreign-born individuals filled 80 percent of the Texas jobs added from 2009 into 2011|last=Shelby|first=W. Gardner|date=December 2, 2011|website=Politifact. politifact.com|language=en}}

Norman Matloff, a UC Davis professor of computer science, wrote a report featured at CIS arguing that most H-1B visa workers, rather than being "the best and the brightest", are mostly of average talent.{{cite web|url=http://cis.org/articles/2008/back508.html|title=H-1Bs: Still Not the Best and Brightest|last1=Matloff|first1=Norman|date=May 12, 2008}}{{cite journal|last1=Matloff|first1=Norman|date=January 1, 2013|title=Immigration and the tech industry: As a labour shortage remedy, for innovation, or for cost savings?|url=http://econpapers.repec.org/article/migjournl/v_3a10_3ay_3a2013_3ai_3a2_3ap_3a210-227.htm|journal=Migration Letters|volume=10|issue=2|pages=210–27|doi=10.33182/ml.v10i2.144|s2cid=41167654 |issn=1741-8984|url-access=subscription}}{{cite web|url=http://www.epi.org/publication/bp356-foreign-students-best-brightest-immigration-policy/|title=Are foreign students the 'best and brightest'?: Data and implications for immigration policy|last=Matloff|first=Norman|date=February 28, 2013|website=Economic Policy Institute}} James Shrek of The Heritage Foundation argued that Matloff's methodology was a "highly misleading measure of ability", as Matloff simply looked at the wages of the H-1B visa workers and how they compared to other workers in the sector.{{Cite news|url=http://www.heritage.org/research/reports/2008/05/h-1b-workers-highly-skilled-highly-needed|archive-url=https://web.archive.org/web/20100322054614/http://www.heritage.org/Research/Reports/2008/05/H-1B-Workers-Highly-Skilled-Highly-Needed|url-status=unfit|archive-date=March 22, 2010|title=H-1B Workers: Highly Skilled, Highly Needed|last=Sherk|first=James|date=May 6, 2008|newspaper=The Heritage Foundation|access-date=February 3, 2017|language=en-US}} Shrek notes that the existing data shows that H-1B workers are more skilled than the average American: "H-1B workers are highly educated. Almost half have an advanced degree. The median H-1B worker earns 90 percent more than the median U.S. worker. They are in no way average workers." Matloff, in his reply, said that H-1B workers were not supposed to be compared to median workers and that Sherk's argument is "completely at odds with the claims the industry has made concerning the "best and brightest" issue" and that comparison to O-1 visa wage data showed that H-1B visas were being used by employers to undercut wages.{{cite web|url=http://heather.cs.ucdavis.edu/Archive/HeritageFound.txt|title=Heritage Foundation analysis of my CIS article|last1=Matloff|first1=Norm|date=May 7, 2008|website=UC Davis}}

In May 2014, a CIS report said that in 2013 Immigration and Customs Enforcement had "freed 36,007 convicted criminal aliens from detention who were awaiting the outcome of deportation proceedings ... [and t]he vast majority of these releases from ICE custody were discretionary, not required by law (in fact, in some instances, apparently contrary to law), nor the result of local sanctuary policies."{{cite web|url=http://cis.org/ICE-Document-Details-36000-Criminal-Aliens-Release-in-2013|title=ICE Document Details 36,000 Criminal Alien Releases in 2013|last=Vaughan|first=Jessica M.|date=May 11, 2014|website=Center for Immigration Studies|language=en}} An ICE spokesman said that many such releases were required by law, for instance when a detainee's home country refuses to accept them or required by a judge's order.{{cite web|url=http://www.politifact.com/texas/statements/2014/jun/10/lamar-smith/lamar-smith-claim-about-obamas-prison-break-illega/|title=Lamar Smith claim about Obama's 'prison break' of illegal immigrants fails to acknowledge detainees had served criminal sentences and all releases weren't discretionary|last=Shelby|first=W. Gardner|date=June 10, 2014|website=Politifact|language=en}} Caitlin Dickson, writing in the Daily Beast said that ICE had "highlighted key points that CIS failed to address."{{cite news|url=http://www.thedailybeast.com/articles/2014/05/15/inside-the-center-for-immigration-studies-the-immigration-false-fact-think-tank.html|title=Inside The Center For Immigration Studies, The Immigration False-Fact Think Tank|last1=Dickson|first1=Caitlin|date=May 15, 2014|work=The Daily Beast}} Associated Press, however, when reporting on CIS's figures, said that "the releases that weren't mandated by law, including [the] 28 percent of the immigrants with homicide convictions, undermines the government's argument that it uses its declining resources for immigration enforcement to find and jail serious criminal immigrants who may pose a threat to public safety or national security."{{cite news|url=http://bigstory.ap.org/article/data-dhs-freed-thousands-convicted-immigrants|title=Data: DHS freed thousands of criminal immigrants|last1=Caldwell|first1=Alicia A.|agency=AP}} CIS's report was criticized by the Immigration Policy Center of the American Immigration Council who said that "looking at this group of people as an undifferentiated whole doesn't tell you much about who poses a risk to public safety and who does not." Muzaffar Chishti, the New York director of the nonpartisan Migration Policy Institute, said that the CIS report was "a select presentation of a set of facts without any comparative analysis that can lead to misleading conclusions." According to CBS, Gregory Chen of the American Immigration Lawyers Association said the report had "a lot of misleading information" and "that the report's definition of criminals who have been 'released' includes those who are still subject to supervision including electronic ankle monitoring and regular check ins with ICE."{{Cite news|url=http://www.cbsnews.com/news/report-u-s-released-thousands-of-immigrant-felons-last-year/|title=Report: U.S. released thousands of immigrant felons last year|last=Kaplan|first=Rebecca|date=May 15, 2014|publisher=CBS News|access-date=March 29, 2017|language=en}}

A May 2015 report by CIS stated that "immigrant households receive 41 percent more federal welfare than households headed by native-born citizens."{{Cite news|url=http://www.csmonitor.com/USA/Society/2016/0509/Do-immigrants-receive-more-welfare-money-than-natural-born-US-citizens|title=Do immigrants receive more welfare money than natural born US citizens?|last=Rosen|first=Ben|date=May 9, 2016|work=The Christian Science Monitor|access-date=March 24, 2017|issn=0882-7729}} The report was criticized on the basis of poor methodology by Alex Nowrasteh of the Cato Institute. Nowrasteh said that the report opted not to examine how much welfare immigrants use, but to examine households led by an immigrant so that the report could count the welfare usage of the immigrant's US-born children, which leads to a misleading estimate of immigrant welfare use.

In September 2016, CIS misrepresented the findings of a comprehensive state-of-the-art report on the academic immigration literature by the National Academies of Sciences. CIS headlined its own summary of the report, "National Academy of Sciences Study of Immigration: Workers and Taxpayers Lose, Businesses Benefit."{{Cite journal|last1=Iyengar|first1=Shanto|last2=Massey|first2=Douglas S.|date=2019-04-16|title=Scientific communication in a post-truth society|journal=Proceedings of the National Academy of Sciences|language=en|volume=116|issue=16|pages=7656–7661|doi=10.1073/pnas.1805868115|pmid=30478050|issn=0027-8424|pmc=6475392|doi-access=free|bibcode=2019PNAS..116.7656I }} A 2018 Proceedings of the National Academy of Sciences study cited CIS's misrepresentation, which was repeated by President Trump, as an example of unscrupulous actors with ulterior motives who make it difficult for researchers to communicate scientific findings to the public.

In 2017, Stephen Miller, a senior White House policy adviser, sought to get the State Department to use figures from CIS that were considered flawed by the State Department. They claimed that refugees cost 12 times more to resettle in the United States than to resettle them in the region of the world where they were from. State Department officials refused to use the CIS report because the report failed to take into account the contributions that the refugees would make through paying taxes.{{Cite news|url=https://www.nytimes.com/2019/11/14/us/politics/immigration-trump.html|title=Emails Outline Anti-Immigration Group's Connection to Stephen Miller|last=Rogers|first=Katie|date=2019-11-14|work=The New York Times|access-date=2019-12-26|language=en-US|issn=0362-4331}}

A February 2017 CIS report said that "72 individuals from the seven countries covered in President Trump's vetting executive order have been convicted in terror cases since the 9/11 attacks", an assertion that several fact-checking agencies debunked.{{Cite news|url=http://www.factcheck.org/2017/02/terrorism-and-trumps-travel-ban/|title=Terrorism and Trump's Travel Ban|last=Kiely|first=Eugene|date=February 24, 2017|publisher=FactCheck.org|access-date=March 24, 2017|language=en-US}} Stephen Miller, a senior White House policy adviser, used the data provided by CIS to justify President Trump's 90-day travel ban, earning him "Three Pinocchois" from the Washington Post Fact-Checker (its second-worst rating).{{Cite news|url=https://www.washingtonpost.com/news/fact-checker/wp/2017/02/13/stephen-millers-claim-that-72-from-banned-countries-were-implicated-in-terroristic-activity/|title=Stephen Miller's claim that 72 from banned countries were implicated in 'terroristic activity'|last=Ya Hee Lee|first=Michelle|date=February 13, 2017|newspaper=The Washington Post|access-date=March 29, 2017}} FactCheck.org found that most (44 of the 72) had not been convicted on terrorism charges, and that none of the 72 people were responsible for a terrorism-related death in the US, and Snopes mirrored the assessment.

In March 2018, the Trump administration stated that construction on a Mexico border wall would pay for itself by keeping undocumented immigrants out of the United States, citing a CIS report.{{Cite news|url=https://www.factcheck.org/2018/03/will-trumps-wall-pay-for-itself/|title=Will Trump's Wall Pay for Itself? |last=Farley|first=Robert|date=March 16, 2018|publisher=FactCheck.org|access-date=April 5, 2018|language=en-US}} The CIS report was based on data from the 2016 National Academies of Science (NAS) report. However, several of the authors of the NAS report said that CIS misused the data from the report, made unjustifiable methodological decisions, and that it was likelier that keeping undocumented immigrants out would reduce government revenue.{{Cite news|url=https://www.snopes.com/news/2018/03/22/will-border-wall-pay-immigrants-cost-government-money/|title=Will A Border Wall 'Pay For Itself' Because Immigrants Cost the Government Money?|last=Kasprak|first=Alex|date=March 23, 2018|publisher=Snopes |access-date=April 5, 2018|language=en-US}} The 18-member panel of economists, sociologists, demographers and public policy experts, and chosen by the National Academies of Science, concluded that undocumented immigrants had a net positive fiscal impact.

In 2020, CIS published a report arguing that refugees had an adverse fiscal impact. The Niskanen Center pointed out that the report in question used arbitrary and questionable cut-offs to make claims about the fiscal impact of the refugees. For example, CIS downgraded refugees' educational attainment in questionable ways, such as claiming that refugees with medical degrees had only "some college".{{Cite web|date=2020-10-20|title=CIS's Denial of Educational Downgrading|url=https://www.niskanencenter.org/cis-educational-downgrading/|access-date=2020-10-29|website=Niskanen Center|language=en}}

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