Election 2010 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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2010 Senate election results by state and county
Republicans won 24 of the Senate seats up and gained six in a Tea Party midterm, though Democrats held on to their majority.
34 Senate races were held in 2010, plus 5 special elections. Democrats won 10 and Republicans 23, and 1 went to neither party.
The closest were Illinois (R+1.6), Colorado (D+1.6) and Pennsylvania (R+2.0). 6 seats changed party: Alaska to the third party, Arkansas to the Republicans, Illinois to the Republicans, Indiana to the Republicans, North Dakota to the Republicans and Wisconsin 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 2010 Senate elections
Barack Obama's first two years brought the stimulus bill and the Affordable Care Act, passed while unemployment stayed near 10 percent. The Tea Party movement drove a conservative surge. Republicans won 24 Senate races to the Democrats' 10 and gained six seats: Arkansas, Illinois, Indiana, North Dakota, Pennsylvania and Wisconsin. Democrats kept a 53-47 majority. Earlier in the year, Scott Brown had won a Massachusetts special election for the seat long held by Edward Kennedy. In Wisconsin, Ron Johnson beat Russ Feingold by 4.8 points, and in Pennsylvania Pat Toomey beat Joe Sestak by 2 points. Mark Kirk won Obama's old Illinois seat by 1.6 points over Alexi Giannoulias, and Dan Coats returned to the Senate from Indiana. Some Tea Party candidates cost Republicans winnable seats. In Nevada, Majority Leader Harry Reid beat Sharron Angle by 5.7 points, and in Colorado Michael Bennet beat Ken Buck by 1.6 points. Delaware also stayed Democratic. In Alaska, Lisa Murkowski lost her primary but won re-election as a write-in candidate.
Every race
| State | Democrat | Votes | Republican | Votes | Others | Margin |
|---|---|---|---|---|---|---|
| Alabama | William G. Barnes | 515,619 (34.7%) | Richard C. Shelby | 968,181 (65.2%) | 1,699 | R+30.5 |
| Alaska flip | Scott McAdams | 60,045 (23.5%) | Joe Miller | 90,839 (35.5%) | Lisa Murkowski (Republican) 101,091 (39.5%) |
Ind. +4.0 |
| Alaska: Lisa Murkowski won as a write-in candidate after losing the Republican primary to Joe Miller. | ||||||
| Arizona | Rodney Glassman | 592,011 (34.7%) | John McCain | 1,005,615 (58.9%) | 110,858 | R+24.2 |
| Arkansas flip | Blanche L. Lincoln | 288,156 (36.9%) | John Boozman | 451,618 (57.9%) | 40,183 | R+21.0 |
| California | Barbara Boxer | 5,218,441 (52.2%) | Carly Fiorina | 4,217,366 (42.2%) | 564,353 | D+10.0 |
| Colorado | Michael F. Bennet | 851,590 (48.1%) | Ken Buck | 822,731 (46.4%) | 97,965 | D+1.6 |
| Connecticut | Richard Blumenthal | 636,040 (55.2%) | Linda E. McMahon | 498,341 (43.2%) | 18,734 | D+11.9 |
| Delaware (special) | Christopher A. Coons | 174,012 (56.6%) | Christine O'Donnell | 123,053 (40.0%) | 10,337 | D+16.6 |
| Florida | Kendrick Meek | 1,092,936 (20.2%) | Marco Rubio | 2,645,743 (48.9%) | Charlie Crist (Independent) 1,607,549 (29.7%) |
R+28.7 |
| Georgia | Michael Thurmond | 996,516 (39.0%) | Johnny Isakson | 1,489,904 (58.3%) | 68,838 | R+19.3 |
| Hawaii | Daniel K. Inouye | 277,228 (74.8%) | Cam Cavasso | 79,939 (21.6%) | 13,416 | D+53.2 |
| Idaho | P. Tom Sullivan | 112,057 (24.9%) | Mike Crapo | 319,953 (71.2%) | 17,520 | R+46.3 |
| Illinois flip | Alex Giannoulias | 1,719,478 (46.4%) | Mark Kirk | 1,778,698 (48.0%) | 206,297 | R+1.6 |
| Illinois (special) flip | Alexi Giannoulias | 1,641,486 (46.3%) | Mark Kirk | 1,677,729 (47.3%) | 226,769 | R+1.0 |
| Indiana flip | Brad Ellsworth | 697,775 (40.0%) | Dan Coats | 952,116 (54.6%) | Rebecca Sink-Burris (Libertarian) 94,330 (5.4%) |
R+14.6 |
| Iowa | Roxanne Conlin | 371,686 (33.3%) | Chuck Grassley | 718,215 (64.4%) | 26,162 | R+31.1 |
| Kansas | Lisa Johnston | 220,971 (26.4%) | Jerry Moran | 587,175 (70.1%) | 29,546 | R+43.7 |
| Kentucky | Jack Conway | 600,052 (44.2%) | Rand Paul | 755,706 (55.7%) | 338 | R+11.5 |
| Louisiana | Charlie Melançon | 476,572 (37.7%) | David Vitter | 715,415 (56.6%) | 73,007 | R+18.9 |
| Maryland | Barbara Mikulski | 1,140,615 (62.2%) | Eric Wargotz | 655,666 (35.8%) | 37,577 | D+26.4 |
| Massachusetts (special) | Martha Coakley | 1,060,861 (47.1%) | Scott P. Brown | 1,168,178 (51.9%) | 22,388 | R+4.8 |
| Missouri | Robin Carnahan | 789,736 (40.6%) | Roy Blunt | 1,054,160 (54.2%) | 100,003 | R+13.6 |
| Nevada | Harry Reid | 362,785 (50.3%) | Sharron Angle | 321,361 (44.5%) | 37,258 | D+5.7 |
| New Hampshire | Paul W. Hodes | 167,545 (36.8%) | Kelly Ayotte | 273,218 (60.1%) | 13,947 | R+23.2 |
| New York | Chuck Schumer | 3,047,111 (66.3%) | Jay Townsend | 1,479,724 (32.2%) | 68,540 | D+34.1 |
| New York (special) | Kirsten Gillibrand | 2,836,361 (62.9%) | Joe DioGuardi | 1,581,834 (35.1%) | 88,431 | D+27.8 |
| North Carolina | Elaine Marshall | 1,145,074 (43.0%) | Richard Burr | 1,458,046 (54.8%) | 56,959 | R+11.8 |
| North Dakota flip | Tracy Potter | 52,955 (22.2%) | John Hoeven | 181,689 (76.2%) | 3,890 | R+54.0 |
| Ohio | Lee Fisher | 1,503,297 (39.4%) | Rob Portman | 2,168,742 (56.8%) | 143,059 | R+17.4 |
| Oklahoma | Jim Rogers | 265,814 (26.1%) | Thomas A. Coburn | 718,482 (70.6%) | 32,855 | R+44.5 |
| Oregon | Ron Wyden | 825,507 (57.2%) | Jim Huffman | 566,199 (39.2%) | 50,882 | D+18.0 |
| Pennsylvania | Joe Sestak | 1,948,716 (49.0%) | Pat Toomey | 2,028,945 (51.0%) | R+2.0 | |
| South Carolina | Alvin Greene | 364,598 (27.6%) | Jim DeMint | 810,771 (61.5%) | Tom Clements (Green) 121,472 (9.2%) |
R+33.8 |
| South Dakota | none | John Thune | 227,947 (100.0%) | R+100.0 | ||
| Utah | Sam Granato | 207,685 (32.8%) | Mike Lee | 390,179 (61.6%) | Scott Bradley (Constitution) 35,937 (5.7%) |
R+28.8 |
| Vermont | Patrick J. Leahy | 151,281 (64.3%) | Len Britton | 72,699 (30.9%) | 11,198 | D+33.4 |
| Washington | Patty Murray | 1,314,930 (52.4%) | Dino Rossi | 1,196,164 (47.6%) | D+4.7 | |
| West Virginia (special) | Joe Manchin III | 283,358 (53.5%) | John R. Raese | 230,013 (43.4%) | 16,577 | D+10.1 |
| Wisconsin flip | Russell D. Feingold | 1,020,958 (47.0%) | Ron Johnson | 1,126,133 (51.9%) | 24,240 | R+4.8 |
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.