Senate
United States elections · 2008 · held
State Senate races in this election cycle, with separate candidate results and election-era ideology attribution.
State races and results map
Each race has its own denominator. Missing counts are blank. The interactive map uses modern state outlines as navigation references.
Alabama — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jeff Sessions | Republican | 1305383 | 63.36% | Elected |
| Vivian Davis Figures | Democratic | 752391 | 36.52% | — |
| Write-ins | Write-In | 2417 | 0.12% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jeff Sessions (Republican) 63.4%
▌Vivian Davis Figures (Democratic) 36.5%
Sources & further reading
Alaska — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mark Begich | Democratic | 151767 | 47.77% | Elected |
| Ted Stevens | Republican | 147814 | 46.52% | — |
| Bob Bird | Independence | 13197 | 4.15% | — |
| Fredrick Haase | Libertarian | 2483 | 0.78% | — |
| Ted Gianoutsos | Independent | 1385 | 0.44% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Mark Begich (Democratic) 47.8%
▌Ted Stevens (Republican) 46.6%
▌Bob Bird (Alaskan Independence) 4.2%
Others
▌David Haase (Libertarian) 0.8%
▌Ted Gianoutsos (Independent) 0.4%
Sources & further reading
Arkansas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mark Pryor | Democratic | 804678 | 79.53% | Elected |
| Rebekah Kennedy | Green | 207076 | 20.47% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Mark Pryor (Democratic) 79.5%
▌Rebekah Kennedy (Green) 20.5%
Sources & further reading
Colorado — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mark Udall | Democratic | 1230994 | 52.80% | Elected |
| Bob Schaffer | Republican | 990755 | 42.49% | — |
| Douglas Campbell | Constitution | 59733 | 2.56% | — |
| Bob Kinsey | Green | 50004 | 2.14% | — |
Incumbent retired. Democratic gain. Source candidate / selection detail: ▌Y Mark Udall (Democratic) 52.8%
▌Bob Schaffer (Republican) 42.5%
▌Doug Campbell (Constitution) 2.6%
▌Bob Kinsey (Green) 2.1%
Sources & further reading
Delaware — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Joe Biden | Democratic | 257539 | 64.69% | Elected |
| Christine O'Donnell | Republican | 140595 | 35.31% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Joe Biden (Democratic) 64.7%
▌Christine O'Donnell (Republican) 35.3%
Sources & further reading
Georgia — Senate — First round
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Saxby Chambliss | Republican | 1867097 | 49.80% | Advancing to runoff |
| Jim Martin | Democratic | 1757393 | 46.80% | Advancing to runoff |
| Allen Buckley | Libertarian | 127923 | 3.40% | — |
| Eleanor Garcia (write-in) | Socialist Workers | 43 | 0.00% | — |
| William Salomone Jr. (write-in) | Independent | 29 | 0.00% | — |
First round of this seat election. The elected candidate is recorded in the separate runoff race. Excluded from the Senate diagram to avoid counting the same seat twice.
Sources & further reading
Georgia — Senate — Runoff
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Saxby Chambliss | Republican | 1228033 | 57.44% | Elected |
| Jim Martin | Democratic | 909923 | 42.56% | — |
Incumbent re-elected in runoff. Source candidate / selection detail: First round:
▌Y Saxby Chambliss (Republican) 49.8%
▌Y Jim Martin (Democratic) 46.8%
▌Allen Buckley (Libertarian) 3.4%
Runoff:
▌Y Saxby Chambliss (Republican) 57.5%
▌Jim Martin (Democratic) 42.5%
Sources & further reading
Idaho — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jim Risch | Republican | 371744 | 57.65% | Elected |
| Larry LaRocco | Democratic | 219903 | 34.11% | — |
| Rex Rammell | Independent | 34510 | 5.35% | — |
| Kent Marmon | Libertarian | 9958 | 1.54% | — |
| Pro-Life | Independent | 8662 | 1.34% | — |
Incumbent retired. Republican hold. Source candidate / selection detail: ▌Y Jim Risch (Republican) 57.7%
▌Larry LaRocco (Democratic) 34.1%
▌Rex Rammell (Independent) 5.4%
Others
▌Kent Marmon (Libertarian) 1.5%
▌Pro-Life (Independent) 1.3%
Sources & further reading
Illinois — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Dick Durbin | Democratic | 3615844 | 67.84% | Elected |
| Steve Sauerberg | Republican | 1520621 | 28.53% | — |
| Kathy Cummings | Green | 119135 | 2.24% | — |
| Larry A. Stafford | Libertarian | 50224 | 0.94% | — |
| Chad N. Koppie | Constitution | 24059 | 0.45% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Dick Durbin (Democratic) 67.8%
▌Steve Sauerberg (Republican) 28.5%
Others
▌Kathy Cummings (Green) 2.2%
▌Larry Stafford (Libertarian) 0.9%
▌Chad Koppie (Constitution) 0.5%
Sources & further reading
Iowa — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Tom Harkin | Democratic | 941665 | 62.66% | Elected |
| Christopher Reed | Republican | 560006 | 37.26% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Tom Harkin (Democratic) 62.7%
▌Christopher Reed (Republican) 37.3%
Sources & further reading
Kansas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Pat Roberts | Republican | 727121 | 60.06% | Elected |
| Jim Slattery | Democratic | 441399 | 36.46% | — |
| Randall Hodgkinson | Libertarian | 25727 | 2.12% | — |
| Joseph L. Martin | Reform | 16443 | 1.36% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Pat Roberts (Republican) 60.0%
▌Jim Slattery (Democratic) 36.4%
Others
▌Randall Hodgkinson (Libertarian) 2.1%
▌Joseph Martin (Reform) 1.3%
Sources & further reading
Kentucky — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mitch McConnell | Republican | 953816 | 52.97% | Elected |
| Bruce Lunsford | Democratic | 847005 | 47.03% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Mitch McConnell (Republican) 53.0%
▌Bruce Lunsford (Democratic) 47.0%
Sources & further reading
Louisiana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mary Landrieu | Democratic | 988298 | 52.11% | Elected |
| John Neely Kennedy | Republican | 867177 | 45.72% | — |
| Richard Fontanesi | Libertarian | 18590 | 0.98% | — |
| Jay Patel | Independent | 13729 | 0.72% | — |
| Robert Stewart | Independent | 8780 | 0.46% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Mary Landrieu (Democratic) 52.1%
▌John Kennedy (Republican) 45.7%
Others
▌Richard Fontanesi (Libertarian) 1.0%
▌Jay Patel (Independent) 0.7%
▌Robert Stewart (Independent) 0.5%
Sources & further reading
Maine — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Susan Collins | Republican | 444300 | 61.33% | Elected |
| Tom Allen | Democratic | 279510 | 38.58% | — |
| write-ins | Write-in | 620 | 0.09% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Susan Collins (Republican) 61.3%
▌Tom Allen (Democratic) 38.6%
Sources & further reading
Massachusetts — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Kerry | Democratic | 1959843 | 65.82% | Elected |
| Jeff Beatty | Republican | 922727 | 30.99% | — |
| Robert J. Underwood | Libertarian | 93713 | 3.02% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John Kerry (Democratic) 65.8%
▌Jeff Beatty (Republican) 31.0%
▌Robert Underwood (Libertarian) 3.2%
Sources & further reading
Michigan — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Carl Levin | Democratic | 3038386 | 62.66% | Elected |
| Jack Hoogendyk | Republican | 1641070 | 33.85% | — |
| Scotty Boman | Libertarian | 76347 | 1.57% | — |
| Harley Mikkelson | Green | 43440 | 0.90% | — |
| Michael Nikitin | U.S. Taxpayers | 30827 | 0.60% | — |
| Doug Dern | Natural Law | 18550 | 0.38% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Carl Levin (Democratic) 62.7%
▌Jack Hoogendyk (Republican) 33.8%
Others
▌Scott Boman (Libertarian) 1.6%
▌Harley Mikkelson (Green) 0.9%
▌Michael Nikitin (Constitution) 0.6%
▌Doug Dern (Natural Law) 0.4%
Sources & further reading
Minnesota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Al Franken | Democratic (DFL) | 1212629 | 41.99% | Elected |
| Norm Coleman | Republican | 1212317 | 41.98% | — |
| Dean Barkley | Independence | 437505 | 15.15% | — |
| Charles Aldrich | Libertarian | 13923 | 0.48% | — |
| James Niemackl | Constitution | 8907 | 0.31% | — |
Incumbent lost re-election. Democratic (DFL) gain. Winner delayed term until July 7, 2009, due to election dispute. Source candidate / selection detail: ▌Y Al Franken (DFL) 41.99%
▌Norm Coleman (Republican) 41.98%
▌Dean Barkley (IPM) 15.15%
Others
▌Charles Aldrich (Libertarian) 0.48%
▌James Niemackl (Constitution) 0.31%
▌Write-ins 0.08%
Sources & further reading
Mississippi — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Thad Cochran | Republican | 766111 | 61.44% | Elected |
| Erik R. Fleming | Democratic | — | 38.60% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Thad Cochran (Republican) 61.4%
▌Erik R. Fleming (Democratic) 38.6%
Sources & further reading
Mississippi — Senate (Class 1) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Roger Wicker | Republican | 683409 | 54.96% | Elected |
| Ronnie Musgrove | Democratic | 560064 | 45.04% | — |
Interim appointee elected. Source candidate / selection detail: ▌Y Roger Wicker (Republican) 55.0%
▌Ronnie Musgrove (Democratic) 45.0%
Sources & further reading
Montana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Max Baucus | Democratic | 348289 | 72.92% | Elected |
| Bob Kelleher | Republican | 129369 | 27.08% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Max Baucus (Democratic) 72.9%
▌Bob Kelleher (Republican) 27.1%
Sources & further reading
Nebraska — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mike Johanns | Republican | 455854 | 57.52% | Elected |
| Scott Kleeb | Democratic | 317456 | 40.06% | — |
| Kelly Renee Rosberg | Nebraska | 11438 | 1.44% | — |
| Steve Larrick | Green | 7763 | 1.00% | — |
Incumbent retired. Republican hold. Source candidate / selection detail: ▌Y Mike Johanns (Republican) 57.5%
▌Scott Kleeb (Democratic) 40.1%
Others
▌Kelly Rosberg (Nebraska) 1.4%
▌Steve Larrick (Green) 1.0%
Sources & further reading
New Hampshire — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jeanne Shaheen | Democratic | 358438 | 51.59% | Elected |
| John Sununu | Republican | 314403 | 45.30% | — |
| Ken Blevens | Libertarian | 21516 | 3.10% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Jeanne Shaheen (Democratic) 51.7%
▌John E. Sununu (Republican) 45.2%
▌Ken Blevens (Libertarian) 3.1%
Sources & further reading
New Jersey — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Frank Lautenberg | Democratic | — | 56.00% | Elected |
| Dick Zimmer | Republican | 1461025 | 41.95% | — |
| Jason Scheurer | Libertarian | 18810 | 0.54% | — |
| J. M. Carter | Independent | 15935 | 0.46% | — |
| Daryl Mikell Brooks | Independent | 15925 | 0.46% | — |
| Jeffrey Boss | Independent | 10345 | 0.30% | — |
| Sara Lobman | Socialist Workers | — | 0.30% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Frank Lautenberg (Democratic) 56.0%
▌Dick Zimmer (Republican) 42.0%
Others
▌Jason Scheurer (Libertarian) 0.5%
▌J. M. Carter (Independent) 0.5%
▌Daryl Mikell Brooks (Independent) 0.5%
▌Jeffrey Boss (Independent) 0.3%
▌Sara Lobman (Socialist Workers) 0.3%
Sources & further reading
New Mexico — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Tom Udall | Democratic | 505128 | 61.33% | Elected |
| Steve Pearce | Republican | 318522 | 38.67% | — |
Incumbent retired. Democratic gain. Source candidate / selection detail: ▌Y Tom Udall (Democratic) 61.3%
▌Steve Pearce (Republican) 38.7%
Sources & further reading
North Carolina — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Kay Hagan | Democratic | 2249311 | 52.65% | Elected |
| Elizabeth Dole | Republican | 1887510 | 44.18% | — |
| Chris Cole | Libertarian | 133430 | 3.17% | — |
| Write-Ins | Other | 1719 | 0.00% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Kay Hagan (Democratic) 52.7%
▌Elizabeth Dole (Republican) 44.2%
▌Chris Cole (Libertarian) 3.1%
Sources & further reading
Oklahoma — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jim Inhofe | Republican | 763375 | 56.68% | Elected |
| Andrew Rice | Democratic | 527736 | 39.18% | — |
| Stephen Wallace | Independent | 55708 | 4.14% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jim Inhofe (Republican) 56.7%
▌Andrew Rice (Democratic) 39.2%
▌Stephen Wallace (Independent) 4.1%
Sources & further reading
Oregon — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jeff Merkley | Democratic | 864392 | 48.90% | Elected |
| Gordon H. Smith | Republican | 805159 | 45.55% | — |
| David Brownlow | Constitution | 92565 | 5.24% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Jeff Merkley (Democratic) 48.9%
▌Gordon H. Smith (Republican) 45.6%
▌Dave Brownlow (Constitution) 5.2%
Sources & further reading
Rhode Island — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jack Reed | Democratic | — | 73.40% | Elected |
| Robert Tingle | Republican | — | 26.60% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jack Reed (Democratic) 73.4%
▌Robert Tingle (Republican) 26.6%
Sources & further reading
South Carolina — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Lindsey Graham | Republican | 1076534 | 57.52% | Elected |
| Bob Conley | Democratic | 790621 | 42.25% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Lindsey Graham (Republican) 57.5%
▌Bob Conley (Democratic) 42.3%
Sources & further reading
South Dakota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Tim Johnson | Democratic | 237889 | 62.49% | Elected |
| Joel Dykstra | Republican | 142784 | 37.51% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Tim Johnson (Democratic) 62.5%
▌Joel Dykstra (Republican) 37.5%
Sources & further reading
Tennessee — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Lamar Alexander | Republican | 1579477 | 65.14% | Elected |
| Bob Tuke | Democratic | 767236 | 31.64% | — |
| Edward L. Buck | Independent | 31631 | 1.30% | — |
| Christopher G. Fenner | Independent | 11073 | 0.46% | — |
| Daniel Towers Lewis | Independent | 9367 | 0.39% | — |
| Chris Lugo | Independent | 9170 | 0.38% | — |
| Ed Lawhorn | Independent | 8986 | 0.37% | — |
| David Gatchell | Independent | 7645 | 0.32% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Lamar Alexander (Republican) 65.1%
▌Bob Tuke (Democratic) 31.6%
Others
▌Edward Buck (Independent) 1.3%
▌Christopher Fenner (Independent) 0.5%
▌Daniel Lewis (Libertarian) 0.4%
▌Chris Lugo (Green) 0.4%
▌Ed Lawhorn (Independent) 0.4%
▌David Gatchell (Independent) 0.3%
Sources & further reading
Texas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Cornyn | Republican | 4337469 | 54.82% | Elected |
| Rick Noriega | Democratic | 3389365 | 42.83% | — |
| Yvonne Adams Schick | Libertarian | 185241 | 2.34% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John Cornyn (Republican) 54.8%
▌Rick Noriega (Democratic) 42.8%
▌Yvonne Adams Schick (Libertarian) 2.3%
Sources & further reading
Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mark Warner | Democratic | 2369327 | 65.03% | Elected |
| Jim Gilmore | Republican | 1228830 | 33.72% | — |
| Glenda Parker | Independent Greens | 21690 | 0.60% | — |
| Bill Redpath | Libertarian | 20269 | 0.56% | — |
Incumbent retired. Democratic gain. Source candidate / selection detail: ▌Y Mark Warner (Democratic) 65.0%
▌Jim Gilmore (Republican) 33.7%
Others
▌Bill Redpath (Libertarian) 0.6%
▌Gail Parker (Independent Green) 0.6%
Sources & further reading
West Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jay Rockefeller | Democratic | 447560 | 63.70% | Elected |
| Jay Wolfe | Republican | 254629 | 36.26% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jay Rockefeller (Democratic) 63.7%
▌Jay Wolfe (Republican) 36.3%
Sources & further reading
Wyoming — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mike Enzi | Republican | 189046 | 75.63% | Elected |
| Chris Rothfuss | Democratic | 60631 | 24.25% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Mike Enzi (Republican) 75.6%
▌Chris Rothfuss (Democratic) 24.3%
Sources & further reading
Wyoming — Senate (Class 1) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Barrasso | Republican | 183063 | 73.34% | Elected |
| Nick Carter | Democratic | 66202 | 26.52% | — |
| Write-ins | None | 293 | 0.12% | — |
Interim appointee elected. Source candidate / selection detail: ▌Y John Barrasso (Republican) 73.4%
▌Nick Carter (Democratic) 26.5%
Sources & further reading
Results: final · partial coverage · Elected candidates in regular races; continuing senators are not included
| Party / candidate | Votes | Vote share | Seats | Electoral votes |
|---|---|---|---|---|
| Jeff Sessions · Alabama | — | — | 1 | — |
| Mark Begich · Alaska | — | — | 1 | — |
| Mark Pryor · Arkansas | — | — | 1 | — |
| Mark Udall · Colorado | — | — | 1 | — |
| Joe Biden · Delaware | — | — | 1 | — |
| Saxby Chambliss · Georgia | — | — | 1 | — |
| Jim Risch · Idaho | — | — | 1 | — |
| Dick Durbin · Illinois | — | — | 1 | — |
| Tom Harkin · Iowa | — | — | 1 | — |
| Pat Roberts · Kansas | — | — | 1 | — |
| Mitch McConnell · Kentucky | — | — | 1 | — |
| Mary Landrieu · Louisiana | — | — | 1 | — |
| Susan Collins · Maine | — | — | 1 | — |
| John Kerry · Massachusetts | — | — | 1 | — |
| Carl Levin · Michigan | — | — | 1 | — |
| Al Franken · Minnesota | — | — | 1 | — |
| Thad Cochran · Mississippi | — | — | 1 | — |
| Max Baucus · Montana | — | — | 1 | — |
| Mike Johanns · Nebraska | — | — | 1 | — |
| Jeanne Shaheen · New Hampshire | — | — | 1 | — |
| Frank Lautenberg · New Jersey | — | — | 1 | — |
| Tom Udall · New Mexico | — | — | 1 | — |
| Kay Hagan · North Carolina | — | — | 1 | — |
| Jim Inhofe · Oklahoma | — | — | 1 | — |
| Jeff Merkley · Oregon | — | — | 1 | — |
| Jack Reed · Rhode Island | — | — | 1 | — |
| Lindsey Graham · South Carolina | — | — | 1 | — |
| Tim Johnson · South Dakota | — | — | 1 | — |
| Lamar Alexander · Tennessee | — | — | 1 | — |
| John Cornyn · Texas | — | — | 1 | — |
| Mark Warner · Virginia | — | — | 1 | — |
| Jay Rockefeller · West Virginia | — | — | 1 | — |
| Mike Enzi · Wyoming | — | — | 1 | — |
The seat diagram shows only regular seats contested in this cycle, not the full Senate. Special races remain available in the state selector. Early cycles span two years and use legislative selection; missing or non-comparable vote totals are left blank. Candidate ideology is used where sourced; otherwise the broad election-era party tradition is used. Unassessed candidates are not assigned an ideology.
Sources & further reading
U.S. Senate historical party divisions