Election 2012 Results
Each election opens in its own mode: the forecast before the votes are counted, the live count while races are still too close to call, and the results once every race is decided.
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2012 Senate election results by state and county
Obama won a second term and Democrats took 23 of the Senate seats up, gaining two overall after Republican candidates stumbled in Indiana and Missouri.
33 Senate races were held in 2012. Democrats won 23 and Republicans 8, and 2 went to neither party.
The closest were North Dakota (D+0.9), Nevada (R+1.2) and Arizona (R+3.0). 4 seats changed party: Connecticut to the Democrats, Indiana to the Democrats, Maine to the third party and Nebraska to the Republicans.
Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.
About the 2012 Senate elections
Republicans began 2012 with more Democratic seats to target and hopes of winning the Senate. Instead, Obama beat Mitt Romney with 332 electoral votes and Democrats won 23 Senate races to the Republicans' 10. Democrats made a net gain of two seats and held 55 with the two independents who caucused with them. Two Republican candidates hurt their own chances with comments about rape and pregnancy. In Indiana, Richard Mourdock, who had beaten Richard Lugar in the primary, lost to Joe Donnelly by 5.8 points. In Missouri, Todd Akin lost to Claire McCaskill. In Massachusetts, Elizabeth Warren unseated Scott Brown by 7.5 points, and in Maine independent Angus King won the seat left by Olympia Snowe. Republicans gained only Nebraska, where Deb Fischer won. Democrats also won close races in states Romney carried. Heidi Heitkamp took North Dakota by 0.9 points, and Jon Tester held Montana by 3.7 points. Tammy Baldwin won Wisconsin and became the first openly gay senator. Dean Heller held Nevada for the Republicans by 1.2 points.
Every race
| State | Democrat | Votes | Republican | Votes | Others | Margin |
|---|---|---|---|---|---|---|
| Arizona | Richard Carmona | 1,036,542 (46.2%) | Jeff Flake | 1,104,457 (49.2%) | 102,423 | R+3.0 |
| California | Dianne Feinstein | 7,864,624 (62.5%) | Elizabeth Emken | 4,713,887 (37.5%) | D+25.1 | |
| Connecticut flip | Christopher S. Murphy | 828,761 (54.8%) | Linda E. McMahon | 651,089 (43.1%) | 31,914 | D+11.8 |
| Delaware | Thomas R. Carper | 265,415 (66.4%) | Kevin Wade | 115,700 (29.0%) | 18,491 | D+37.5 |
| Florida | Bill Nelson | 4,523,451 (55.2%) | Connie Mack | 3,458,267 (42.2%) | 208,228 | D+13.0 |
| Hawaii | Mazie Hirono | 269,489 (62.6%) | Linda Lingle | 160,994 (37.4%) | D+25.2 | |
| Indiana flip | Joe Donnelly | 1,281,181 (50.0%) | Richard Mourdock | 1,133,621 (44.3%) | Andy Horning (Libertarian) 145,282 (5.7%) |
D+5.8 |
| Maine flip | Cynthia Dill | 92,900 (13.3%) | Charlie Summers | 215,399 (30.7%) | Angus King (Independent) 370,580 (52.9%) |
Ind. +22.2 |
| Maryland | Ben Cardin | 1,474,028 (56.0%) | Dan Bongino | 693,291 (26.3%) | Rob Sobhani (Independent) 430,934 (16.4%) |
D+29.7 |
| Massachusetts | Elizabeth Warren | 1,696,346 (53.7%) | Scott Brown | 1,458,048 (46.2%) | 2,159 | D+7.6 |
| Michigan | Debbie Stabenow | 2,735,826 (58.8%) | Pete Hoekstra | 1,767,386 (38.0%) | 149,706 | D+20.8 |
| Minnesota | Amy Klobuchar | 1,854,595 (65.2%) | Kurt Bills | 867,974 (30.5%) | 120,638 | D+34.7 |
| Mississippi | Albert N. Gore, Jr. | 503,467 (40.6%) | Roger F. Wicker | 709,626 (57.2%) | 28,475 | R+16.6 |
| Missouri | Claire McCaskill | 1,494,125 (54.8%) | Todd Akin | 1,066,159 (39.1%) | Jonathan Dine (Libertarian) 165,468 (6.1%) |
D+15.7 |
| Montana | Jon Tester | 236,123 (48.6%) | Denny Rehberg | 218,051 (44.9%) | Dan Cox (Libertarian) 31,892 (6.6%) |
D+3.7 |
| Nebraska flip | Bob Kerrey | 332,979 (42.2%) | Deb Fischer | 455,593 (57.8%) | R+15.6 | |
| Nevada | Shelley Berkley | 446,080 (44.7%) | Dean Heller | 457,656 (45.9%) | 94,069 | R+1.2 |
| New Jersey | Robert Menendez | 1,987,680 (58.9%) | Joe Kyrillos | 1,329,534 (39.4%) | 59,435 | D+19.5 |
| New Mexico | Martin Heinrich | 395,717 (51.0%) | Heather A. Wilson | 351,260 (45.3%) | 28,816 | D+5.7 |
| New York | Kirsten Gillibrand | 4,822,330 (72.2%) | Wendy Long | 1,758,702 (26.3%) | 98,646 | D+45.9 |
| North Dakota | Heidi Heitkamp | 161,337 (50.2%) | Rick Berg | 158,401 (49.3%) | 1,406 | D+0.9 |
| Ohio | Sherrod Brown | 2,762,690 (50.7%) | Josh Mandel | 2,435,712 (44.7%) | 250,616 | D+6.0 |
| Pennsylvania | Robert P. Casey, Jr. | 3,021,364 (53.7%) | Tom Smith | 2,509,132 (44.6%) | 96,926 | D+9.1 |
| Rhode Island | Sheldon Whitehouse | 271,034 (64.8%) | Benjamin Barrett Hinckley III | 146,222 (35.0%) | 933 | D+29.9 |
| Tennessee | Mark E. Clayton | 705,882 (30.4%) | Bob Corker | 1,506,443 (64.9%) | 109,152 | R+34.5 |
| Texas | Paul Sadler | 3,194,927 (40.6%) | Ted Cruz | 4,440,137 (56.5%) | 229,758 | R+15.8 |
| Utah | Scott Howell | 301,873 (30.0%) | Orrin G. Hatch | 657,608 (65.3%) | 47,420 | R+35.3 |
| Vermont | none | John MacGovern | 72,898 (24.9%) | Bernie Sanders (Independent) 207,848 (71.0%) |
Ind. +46.1 | |
| Virginia | Timothy M. Kaine | 2,010,067 (52.9%) | George F. Allen | 1,785,542 (47.0%) | 6,587 | D+5.9 |
| Washington | Maria Cantwell | 1,855,493 (60.5%) | Michael Baumgartner | 1,213,924 (39.5%) | D+20.9 | |
| West Virginia | Joe Manchin III | 399,898 (60.6%) | John R. Raese | 240,787 (36.5%) | 19,517 | D+24.1 |
| Wisconsin | Tammy Baldwin | 1,547,104 (51.4%) | Tommy G. Thompson | 1,380,126 (45.9%) | 82,181 | D+5.6 |
| Wyoming | Tim Chesnut | 53,019 (21.7%) | John Barrasso | 185,250 (75.7%) | 6,593 | R+54.0 |
Margin: the Democrat's share of all votes minus the Republican's. Margins are Democrat minus Republican, of all votes. Certified results, from the states' own archives, the MIT Election Data and Science Lab, Heideman (2026) and Algara & Amlani (2021). How these results were checked.