2010 United States Senate election in Wisconsin
{{Short description|none}}
{{Use mdy dates|date=December 2017}}
{{Infobox election
| election_name = 2010 United States Senate election in Wisconsin
| country = Wisconsin
| type = presidential
| ongoing = Yes
| previous_election = 2004 United States Senate election in Wisconsin
| previous_year = 2004
| next_election = 2016 United States Senate election in Wisconsin
| next_year = 2016
| election_date = November 2, 2010
| image_size = x150px
| image1 = Ron Johnson, official portrait, 112th Congress (3x4b).jpg
| nominee1 = Ron Johnson
| party1 = Republican Party (United States)
| popular_vote1 = 1,125,932
| percentage1 = 51.86%
| image2 = Russ Feingold Official Portrait 3.jpg
| nominee2 = Russ Feingold
| party2 = Democratic Party (United States)
| popular_vote2 = 1,020,841
| percentage2 = 47.02%
| map_image = {{switcher |250px |County results |250px |Precinct results |default=1}}
| map_caption = Johnson: {{legend0|#FFB2B2|40–50%}} {{legend0|#E27F7F|50–60%}} {{legend0|#d75d5d|60–70%}} {{legend0|#D72F30|70–80%}} {{legend0|#C21B18|80–90%}} {{legend0|#A80000|>90%}}
Feingold: {{legend0|#A5B0FF|40–50%}} {{legend0|#7996e2|50–60%}} {{legend0|#6674de|60–70%}} {{legend0|#584cde|70–80%}} {{legend0|#3933e5|80–90%}} {{legend0|#0D0596|>90%}}
Tie: {{legend0|#D2B1D9}}
| title = U.S. Senator
| before_election = Russ Feingold
| before_party = Democratic Party (United States)
| after_election = Ron Johnson
| after_party = Republican Party (United States)
}}
{{ElectionsWI}}
The 2010 United States Senate election in Wisconsin was held on November 2, 2010. Incumbent Democratic Senator Russ Feingold lost re-election to a fourth term to Republican challenger Ron Johnson, a businessman and first-time candidate. Johnson was the first Republican to win a Senate election in Wisconsin since 1986. Feingold also became the fifth senator in a row from Wisconsin's Class 3 Senate seat to be defeated for re-election in the general election, and the seventh in a row overall to lose by a defeat in either the primary or general elections. Johnson was re-elected in 2016 in a rematch with Feingold.{{Cite web |last=Meyer |first=Theodoric |date=2016-11-09 |title=Johnson upsets Feingold to keep Wisconsin Senate seat |url=https://www.politico.com/story/2016/11/johnson-feingold-wisconsin-senate-race-2016-election-results-231027 |access-date=2024-02-10 |website=POLITICO |language=en}}
Republican primary
= Candidates =
On the ballot
- Stephen Finn, plumber{{Cite web|url=http://www.jsonline.com/news/statepolitics/102233174.html|title=Johnson leads race for GOP Senate bid|website=www.jsonline.com}}
- Ron Johnson, businessman{{cite web | url=http://www.lacrossetribune.com/news/local/govt-and-politics/article_fd9b4a24-62ff-11df-b2e1-001cc4c03286.html | title=GOP's Ron Johnson announces Senate run while in La Crosse | date=April 15, 2010 | access-date=May 19, 2010 | publisher=WKOW}}
- Dave Westlake, businessman{{cite web | url=http://www.politicsdaily.com/2010/01/28/feingold-may-be-vulnerable-if-thompson-seeks-his-wisconsin-senat | title=Feingold May Be Vulnerable If Thompson Seeks His Wisconsin Senate Seat | date=January 28, 2010 | access-date=January 28, 2010 | work=Politics Daily | first=Bruce | last=Drake}}
Declined
- Ted Kanavas, state senator
- Dick Leinenkugel (dropped out), former State Commerce Secretary{{cite web | url=http://www.politico.com/news/stories/0510/37665.html | title=Leinenkugel abruptly exits – David Catanese | date=May 23, 2010 | publisher=Politico.Com | access-date=June 14, 2010}}
- Tommy Thompson, former governor of Wisconsin
- Terrence Wall (dropped out), real estate developer{{cite web | last=Giroux | first=Greg | url=http://blogs.cqpolitics.com/eyeon2010/2010/05/wisconsin-wall-confirms-decisi.html | title=Wisconsin: Wall Confirms Decision To End Senate Bid – The Eye (CQ Politics) | publisher=Blogs.cqpolitics.com | date=May 27, 2010 | access-date=June 14, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20101029181729/http://blogs.cqpolitics.com/eyeon2010/2010/05/wisconsin-wall-confirms-decisi.html | archive-date=October 29, 2010 }}
= Campaign =
Former Republican Governor of Wisconsin Tommy Thompson had expressed an interest in challenging Feingold,{{cite web | url=http://new.wtaq.com/news/articles/2010/jan/26/ex-gov-thompson-being-pushed-run-senate | title=Ex-Gov Thompson Being Pushed To Run For Senate | date=January 26, 2010 | access-date=January 28, 2010 | publisher=WTAQ | archive-url=https://web.archive.org/web/20110718122447/http://wtaq.com/news/articles/2010/jan/26/ex-gov-thompson-being-pushed-run-senate | archive-date=July 18, 2011}} but ruled himself out of the race in April 2010.{{cite web | url=http://www.jsonline.com/news/wisconsin/90943939.html | title=Thompson tells tea party rally he won't run for U.S. Senate | date=April 15, 2010 | access-date=April 16, 2010 | publisher=JS Online}}
Johnson, a millionaire manufacturer and Tea Party movement favorite running for political office for the first time, was the frontrunner. In response to controversy over his ownership of stock in BP, Johnson said he would sell it when market conditions were favorable and possibly use the proceeds to help finance his Senate campaign.{{cite web | url=http://blogs.cqpolitics.com/eyeon2010/2010/07/feingold-senate-wisconsin-dril.html | title=Attack Ad Puts Feingold Foe On Defensive Over Great Lakes Drilling – The Eye (CQ Politics) | publisher=Blogs.cqpolitics.com | date=July 14, 2010 | access-date=August 21, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20100719070417/http://blogs.cqpolitics.com/eyeon2010/2010/07/feingold-senate-wisconsin-dril.html | archive-date=July 19, 2010 }} Johnson was endorsed by: the Club for Growth, a fiscally conservative advocacy organization; former Wisconsin Republican Lt. Governor Margaret Farrow; Republican U.S. Senator Jim DeMint of South Carolina;{{cite web | url=http://www.ronjohnsonforsenate.com/home/category/blog/endorsements | title=Ron Johnson | publisher=Ronjohnsonforsenate.com | access-date=August 21, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20100724011044/http://www.ronjohnsonforsenate.com/home/category/blog/endorsements | archive-date=July 24, 2010 }}{{cite web | url=http://blogs.cqpolitics.com/eyeon2010/2010/07/club-for-growth-lee-utah-johns.html | title=Club For Growth Puts Muscle Into More Races – The Eye (CQ Politics) | publisher=Blogs.cqpolitics.com | date=July 14, 2010 | access-date=August 21, 2010}}{{dead link| date=November 2011}} and Wisconsin Republican U.S. Representatives Jim Sensenbrenner, Tom Petri and Paul Ryan.{{cite web | url=http://www.ronjohnsonforsenate.com/home/2010/07/johnson-collects-gop-endorsements | title=Ron Johnson | publisher=Ronjohnsonforsenate.com | date=July 12, 2010 | access-date=August 21, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20100727084116/http://www.ronjohnsonforsenate.com/home/2010/07/johnson-collects-gop-endorsements | archive-date=July 27, 2010 }} Businessman David Westlake was endorsed by the Republican Liberty Caucus.{{cite web | url=http://www.rlc.org/endorsed-candidates-2010 | title=Endorsed Candidates – 2010 {{!}} Republican Liberty Caucus | publisher=Rlc.org | access-date=August 21, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20100813170153/http://www.rlc.org/endorsed-candidates-2010 | archive-date=August 13, 2010 }} According to OpenSecrets, as of August 25, 2010, Johnson had invested $4.3 million of his own money into his campaign; this amount represented 71 percent of his campaign funds, while 27 percent of his campaign funds ($1.6 million) came from individual contributions.OpenSecrets, August 25, 2010, accessed October 1, 2010, http://www.opensecrets.org/races/summary.php?id=WIS2&cycle=2010
= Polling =
| class="wikitable" style="text-align:center" |
| valign=bottom
! Poll Source ! {{Small|Date(s) ! {{Small|Sample ! {{Small|Margin ! style="width:100px;"| Ron ! style="width:100px;"| Dave ! Other ! Undecided |
| align=left | Public Policy Polling ([http://www.publicpolicypolling.com/pdf/PPP_Release_WI_701.pdf report]{{dead link| date=November 2011}})
| June 26–27, 2010 | 400 | ± 4.9% | {{Party shading/Republican}} | 49% | 11% | –– | 40% |
= Results =
{{Election box begin no change
| title = Republican Primary results{{Cite web|url=https://www.politico.com/2010/maps/#/Senate/2010/WI|title=The 2010 Results Maps|website=POLITICO}}
}}
{{Election box winning candidate with party link no change
| candidate = Ron Johnson
| party = Republican Party (United States)
| votes = 500,821
| percentage = 84.7%
}}
{{Election box candidate with party link no change
| candidate = David Westlake
| party = Republican Party (United States)
| votes = 61,287
| percentage = 10.4%
}}
{{Election box candidate with party link no change
| candidate = Stephen M. Finn
| party = Republican Party (United States)
| votes = 29,002
| percentage = 4.9%
}}
{{Election box total no change
| votes = 591,107
| percentage = 100.0%
}}
{{Election box end}}
General election
= Candidates =
- Russ Feingold (D), incumbent U.S. senator
- Ron Johnson (R), businessman
- Dave Rutowski (I)
- Rob Taylor (I) self-described Constitution Party candidate{{Cite web |url=http://robtaylorforsenate.com/?p=688 |title=Rob Taylor for Senate website |access-date=September 11, 2010 |archive-url=https://web.archive.org/web/20160126154650/http://robtaylorforsenate.com/?p=688 |archive-date=January 26, 2016 |url-status=dead }}{{cite web | url=http://www.wqow.com/Global/story.asp?S=11854770 | archive-url=https://archive.today/20130209210341/http://www.wqow.com/Global/story.asp?S=11854770 | url-status=dead | archive-date=February 9, 2013 | title=Real estate developer launches Senate campaign | date=January 20, 2010 | access-date=January 28, 2010 | publisher=WQOW }}
= Campaign =
Feingold's first television ad was a positive ad released in March. In July 2010, Feingold's second 2010 television election ad attacked Johnson for alleged support for offshore drilling in the Great Lakes. Johnson quickly countered Feingold with a television ad of his own.{{cite web | url=http://www2.wnct.com/news/2010/jul/14/johnson-quick-to-counterattack-feingold-on-oil-ad-ar-300367 | access-date=July 15, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20100718092659/http://www2.wnct.com/news/2010/jul/14/johnson-quick-to-counterattack-feingold-on-oil-ad-ar-300367 | title=Johnson Quick to Counterattack Feingold on Oil Ad | work=WNCT | archive-date=July 18, 2010 }} Feingold's logo was Moving Forward. In one ad, he emphasized independence and called himself a "penny pincher."{{Cite web|url=http://www.jsonline.com/news/statepolitics/101409589.html|title=Washington-based group airs ad attacking Feingold|first=Don |last=Walker|date=2010-08-24}} Johnson argued that manufacturers and accountants were underrepresented in the U.S. Senate, and there were too many lawyers (57 out of 100 members, including Feingold).{{Cite web|url=https://www.politifact.com/wisconsin/statements/2010/oct/22/ron-johnson/ron-johnson-says-there-are-57-lawyers-including-ru/|title=Ron Johnson says there are 57 lawyers, including Russ Feingold, in the U.S. Senate|website=@politifact}} Feingold received the endorsements of the Milwaukee Journal Sentinel and the Green Bay Press-Gazette.{{cite web | title=Wis. Newspapers Unveil Election Endorsements | website=WISN.com | date=2012-03-06 | url=http://www.wisn.com/r/25508115/detail.html | archive-url=https://web.archive.org/web/20120306010005/http://www.wisn.com/r/25508115/detail.html | archive-date=2012-03-06 | url-status=dead | access-date=2019-09-17}} The Beloit Daily News endorsed Johnson.{{cite web | url=http://www.620wtmj.com/news/local/105655088.html | title=Johnson Leads Polls, Feingold Leads Endorsements | work=620 WTMJ | access-date=October 27, 2010 | url-status=dead | archive-url=https://web.archive.org/web/20101028091430/http://www.620wtmj.com/news/local/105655088.html | archive-date=October 28, 2010 }}
= Debates =
- October 8 in Milwaukee
- October 11 in Wausau{{cite news | last=Ramde | first=Dinesh | date=October 12, 2010 | title=Feingold and Johnson spar over funding of attack ads | url=http://chippewa.com/news/local/feingold-and-johnson-spar-over-funding-of-attack-ads/article_672eff72-d618-11df-8f27-001cc4c03286.html | newspaper=Chippewa Herald | agency=Associated Press | access-date=June 16, 2016 }}
- October 22 in Eau Claire on WQOW{{Cite web|url=http://www.wqow.com/Global/story.asp?S=13326651|archive-url=https://web.archive.org/web/20110718121900/http://www.wqow.com/Global/story.asp?S=13326651|url-status=dead|archive-date=July 18, 2011|title=Feingold holds roundtable discussion in Eau Claire – WQOW TV: Eau Claire, WI NEWS18 News, Weather, and Sports}}
= Predictions =
= Polling =
{{hidden begin|titlestyle=background:#cff|title=Hypothetical polling|contentstyle=border:solid 1px silver; padding:8px; background:white;}}
| class="wikitable" style="text-align:center" |
| valign=bottom
! Poll source ! {{Small|Date(s) ! {{Small|Sample ! {{Small|Margin of ! style="width:100px;"| Russ ! style="width:100px;"| David ! Other ! Undecided |
| Public Policy Polling ([https://web.archive.org/web/20110612084215/http://www.publicpolicypolling.com/pdf/PPP_Release_WI_629.pdf report])
| June 26–27, 2010 | 638 | ± 3.9% | {{Party shading/Democratic}} | 45% | 38% | -- | 17% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_wisconsin_senate_june_21_2010 report])
| June 21, 2010 | 500 | ± 4.5% | {{Party shading/Democratic}} | 47% | 41% | 4% | 7% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections/election_2010/election_2010_senate_elections/wisconsin/election_2010_wisconsin_senate report])
| May 25, 2010 | 500 | ± 4.5% | {{Party shading/Democratic}} | 47% | 38% | 7% | 8% |
| Public Policy Polling ([https://web.archive.org/web/20110612084223/http://www.publicpolicypolling.com/pdf/PPP_Release_WI_323.pdf report])
| March 23, 2010 | 700 | ± 3.7% | {{Party shading/Democratic}} | 48% | 31% | — | 21% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_2010_wisconsin_senate_march_16_2010 report])
| March 16, 2010 | 500 | ± 4.5% | {{Party shading/Democratic}} | 51% | 35% | 5% | 10% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_wisconsin_senate_february_17_2010 report])
| February 17, 2010 | 500 | ± 4.5% | {{Party shading/Democratic}} | 47% | 37% | 6% | 10% |
| Public Policy Polling ([http://www.publicpolicypolling.com/pdf/PPP_Release_WI_1124.pdf report]{{dead link|date=January 2025|bot=medic}}{{cbignore|bot=medic}})
| November 20–22, 2009 | 767 | ± 3.5% | {{Party shading/Democratic}} | 47% | 32% | — | 21% |
| class="wikitable" style="text-align:center" |
| valign=bottom
! Poll source ! {{Small|Date(s) ! {{Small|Sample ! {{Small|Margin of}} ! style="width:100px;"| Russ ! style="width:100px;"| Tommy ! Other ! Undecided |
| WPRI ([https://web.archive.org/web/20101113205233/http://www.news.wisc.edu/17172 report])
| September 27–29, 2009 | 700 | ± 3.8% | 39% | {{Party shading/Republican}} | 43% | — | 18% |
| Public Policy Polling ([http://www.publicpolicypolling.com/pdf/surveys/2009_Archives/PPP_Release_WI_1124.pdf report]{{dead link|date=January 2025|bot=medic}}{{cbignore|bot=medic}})
| November 20–22, 2009 | 767 | ± 3.5% | {{Party shading/Democratic}} | 50% | 41% | — | 10% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/election_2010_wisconsin_senate report])
| January 26, 2010 | 500 | ± 4.5% | 43% | {{Party shading/Republican}} | 47% | 6% | 4% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_wisconsin_senate_february_17_2010 report])
| February 17, 2010 | 500 | ± 4.5% | 43% | {{Party shading/Republican}} | 48% | 3% | 5% |
| WPRI ([http://www.jsonline.com/news/statepolitics/87498622.html report])
| March 9, 2010 | 600 | ± 4.0% | 39% | {{Party shading/Republican}} | 51% | — | 9% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_2010_wisconsin_senate_march_16_2010 report])
| March 16, 2010 | 500 | ± 4.5% | 45% | {{Party shading/Republican}} | 47% | 3% | 4% |
| Public Policy Polling ([https://web.archive.org/web/20110612084223/http://www.publicpolicypolling.com/pdf/PPP_Release_WI_323.pdf report])
| March 23, 2010 | 700 | ± 3.7% | {{Party shading/Democratic}} | 47% | 44% | — | 9% |
| class="wikitable" style="text-align:center" |
| valign=bottom
! Poll source ! {{Small|Date(s) ! {{Small|Sample ! {{Small|Margin of}} ! style="width:100px;"| Russ ! style="width:100px;"| Terrence ! Other ! Undecided |
| Public Policy Polling ([http://www.publicpolicypolling.com/pdf/PPP_Release_WI_1124.pdf report]{{dead link|date=January 2025|bot=medic}}{{cbignore|bot=medic}})
| November 20–22, 2009 | 767 | ± 3.5% | {{Party shading/Democratic}} | 48% | 34% | — | 19% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_wisconsin_senate_february_17_2010 report])
| February 17, 2010 | 500 | ± 4.5% | {{Party shading/Democratic}} | 47% | 39% | 6% | 7% |
| WPRI ([http://www.jsonline.com/news/statepolitics/87498622.html report])
| March 9, 2010 | 600 | ± 4.0% | {{Party shading/Democratic}} | 47% | 32% | 6% | 7% |
| Rasmussen Reports ([http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/toplines/toplines_2010_wisconsin_senate_march_16_2010 report])
| March 16, 2010 | 500 | ± 4.5% | {{Party shading/Democratic}} | 49% | 40% | 3% | 9% |
| Public Policy Polling ([https://web.archive.org/web/20110612084223/http://www.publicpolicypolling.com/pdf/PPP_Release_WI_323.pdf report])
| March 23, 2010 | 700 | ± 3.7% | {{Party shading/Democratic}} | 48% | 34% | — | 18% |
{{hidden end}}
= Fundraising =
Through December 31, 2010:
| class="wikitable sortable" |
| Candidate (Party)
! Net Receipts ! Disbursements ! Beginning Cash ! Latest Cash On Hand ! Debt |
|---|
| {{Party shading/Democratic}} | Russ Feingold (D)
| $13,947,563 | $15,544,093 | $2,516,119 | $919,585 | $0 |
| {{Party shading/Republican}} | Ron Johnson (R)
| $15,509,297 | $15,316,651 | $0 | $192,646 | $8,708,465 |
| style="text-align:center" class="sortbottom"
| colspan=6 | Source: Federal Election Commission{{cite web | url=http://query.nictusa.com/cgi-bin/cancomsrs/?_10+CAN+WI | archive-url=https://archive.today/20120713233612/http://query.nictusa.com/cgi-bin/cancomsrs/?_10+CAN+WI | url-status=dead | archive-date=July 13, 2012 | title=Summary Reports Search Results – 2009–2010 Cycle | publisher=fec.gov | access-date=July 9, 2011}} |
= Results =
{{Election box begin
{{Election box winning candidate with party link
| party = Republican Party (United States)
| candidate = Ron Johnson
| votes = 1,125,999
| percentage = 51.86%
| change = +7.75%
}}
{{Election box candidate with party link
| party = Democratic Party (United States)
| candidate = Russ Feingold (incumbent)
| votes = 1,020,958
| percentage = 47.02%
| change = -8.33%
}}
{{Election box candidate with party link
| party = Constitution Party (United States)
| candidate = Rob Taylor
| votes = 23,473
| percentage = 1.08%
| change = N/A
}}
{{Election box write-in with party link
| votes = 901
| percentage = 0.04%
| change = N/A
}}
{{Election box total
| votes = 2,170,430
| percentage = 100.00%
| change = -26.4%
}}
{{Election box gain with party link no swing
| winner = Republican Party (United States)
| loser = Democratic Party (United States)
}}
{{Election box end}}
==Counties that flipped Democratic to Republican==
- Barron (largest city: Rice Lake)
- Brown (largest city: Green Bay)
- Burnett (largest village: Grantsburg)
- Clark (largest city: Neillsville)
- Chippewa (largest city: Chippewa Falls)
- Iron (largest city: Hurley)
- Jefferson (largest city: Watertown)
- Kewaunee (largest city: Algoma)
- Langlade (largest city: Antigo)
- Manitowoc (largest city: Manitowoc)
- Marathon (largest city: Wausau)
- Monroe (largest city: Sparta)
- Oneida (largest city: Rhinelander)
- Outagamie (largest city: Appleton)
- Rusk (largest city: Ladysmith)
- Washburn (largest city: Spooner)
- Buffalo (largest city: Mondovi)
- Columbia (largest city: Portage)
- Door (largest city: Sturgeon Bay)
- Dunn (largest city: Menomonie)
- Forest (largest city: Crandon)
- Grant (largest city: Platteville)
- Jackson (largest city: Black River Falls)
- Juneau (largest city: Mauston)
- Kenosha (largest city: Kenosha)
- Lafayette (largest city: Darlington)
- Lincoln (largest city: Merrill)
- Pepin (largest city: Durand)
- Price (largest city: Park Falls)
- Racine (largest city: Racine)
- Richland (largest city: Richland Center)
- Sawyer (largest city: Hayward)
- Trempealeau (largest city: Arcadia)
- Winnebago (largest city: Oshkosh)
- Adams (largest city: Adams)
- Polk (Largest city: Amery)
- St. Croix (Largest city: Hudson)
- Taylor (Largest city: Medford)
References
{{reflist}}
External links
- [http://gab.wi.gov/elections-voting Elections & Voting] {{Webarchive|url=https://web.archive.org/web/20121107175743/http://gab.wi.gov/elections-voting |date=November 7, 2012 }} at the Wisconsin Government Accountability Board
- [http://gab.wi.gov/elections-voting/results/candidates-on-ballot Candidate list] {{Webarchive|url=https://web.archive.org/web/20100826084101/http://gab.wi.gov/elections-voting/results/candidates-on-ballot |date=August 26, 2010 }}
- [https://web.archive.org/web/20081130014758/http://www.votesmart.org/election_congress_state.php?state_id=WI U.S. Congress candidates for Wisconsin] at Project Vote Smart
- [http://www.ourcampaigns.com/RaceDetail.html?RaceID=374697 Wisconsin U.S. Senate] from OurCampaigns.com
- [http://www.opensecrets.org/races/summary.php?id=WIS2&cycle=2010 Campaign contributions] from Open Secrets
- [https://archive.today/20130131190333/http://www.pollster.com/polls/wi/10-wi-sen-ge.php] 2010 Wisconsin Senate General Election: All Head-to-Head Matchups]{{Dead link|date=May 2020 |bot=InternetArchiveBot |fix-attempted=yes }} graph of multiple polls from Pollster.com
- [http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/wisconsin/election_2010_wisconsin_senate Election 2010: Wisconsin Senate] from Rasmussen Reports
- [http://www.realclearpolitics.com/epolls/2010/senate/2010_wisconsin_senate_race.html 2010 Wisconsin Senate Race] from Real Clear Politics
- [https://web.archive.org/web/20100520022245/http://www.cqpolitics.com/wmspage.cfm?docID=senate-2010-WI 2010 Wisconsin Senate Race] from CQ Politics
- [http://elections.nytimes.com/2010/senate/wisconsin Race profile] from The New York Times
- [http://www.jsonline.com/news/statepolitics Election 2010 news coverage] at the Milwaukee Journal Sentinel
Official campaign websites (Archived)
- [https://web.archive.org/web/20101029003256/http://www.russfeingold.org/ Russ Feingold for U.S. Senate] incumbent
- [https://web.archive.org/web/20101030015327/http://ronjohnsonforsenate.com/home/ Ron Johnson for Senate]
- [https://web.archive.org/web/20100908194626/http://www.davewestlake.org/ Dave Westlake for U.S. Senate]
{{United States elections, 2010}}