Senate
United States elections · 2006 · held
State Senate races in this midterm 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.
Arizona — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jon Kyl | Republican | 814398 | 53.34% | Elected |
| Jim Pederson | Democratic | 664141 | 43.50% | — |
| Richard Mack | Libertarian | 48231 | 3.16% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jon Kyl (Republican) 53.3%
▌Jim Pederson (Democratic) 43.5%
▌Richard Mack (Libertarian) 3.2%
Sources & further reading
California — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Dianne Feinstein | Democratic | 5076289 | 59.43% | Elected |
| Dick Mountjoy | Republican | 2990822 | 35.02% | — |
| Todd Chretien | Green | 147074 | 1.72% | — |
| Michael S. Metti | Libertarian | 133851 | 1.57% | — |
| Marsha Feinland | Peace and Freedom | 117764 | 1.38% | — |
| Don Grundmann | American Independent | 75350 | 0.88% | — |
| Kent Mesplay (write-in) | Green | 160 | 0.00% | — |
| Jeffrey Mackler (write-in) | Independent | 108 | 0.00% | — |
| Lea Sherman (write-in) | Independent | 47 | 0.00% | — |
| Connor Vlakancic (write-in) | Independent | 11 | 0.00% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Dianne Feinstein (Democratic) 59.4%
▌Dick Mountjoy (Republican) 35.2%
Others
▌Don Grundmann (American Independent) 1.8%
▌Todd Chretien (Green) 1.7%
▌Michael Metti (Libertarian) 1.6%
▌Marsha Feinland (Peace and Freedom) 1.3%
Sources & further reading
Connecticut — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Joe Lieberman | Independent Democrat | 564095 | 49.70% | Elected |
| Ned Lamont | Democratic | 450844 | 39.73% | — |
| Alan Schlesinger | Republican | 109198 | 9.62% | — |
| Ralph Ferrucci | Green | 5922 | 0.60% | — |
| Timothy Knibbs | Concerned Citizens | 4638 | 0.40% | — |
| Carl E. Vassar | Write-in | 80 | 0.00% | — |
Incumbent lost renomination, but re-elected as an independent. Independent Democratic gain. Source candidate / selection detail: ▌Y Joe Lieberman (CFL) 49.7%
▌Ned Lamont (Democratic) 39.7%
▌Alan Schlesinger (Republican) 9.6%
Others
▌Ralph Ferrucci (Green) 0.5%
▌Timothy Knibbs (Concerned Citizens) 0.4%
Sources & further reading
Delaware — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Tom Carper | Democratic | — | 67.10% | Elected |
| Jan C. Ting | Republican | — | 27.40% | — |
| Christine O'Donnell | Write-in | — | 4.40% | — |
| William E. Morris | Libertarian | 2671 | 1.10% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Tom Carper (Democratic) 67.1%
▌Jan C. Ting (Republican) 27.4%
▌Christine O'Donnell (Write-in) 4.4%
▌William E. Morris (Libertarian) 1.1%
Sources & further reading
Florida — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bill Nelson | Democratic | 2890548 | 60.30% | Elected |
| Katherine Harris | Republican | 1826127 | 38.10% | — |
| Belinda Noah | Independent | 24880 | 0.52% | — |
| Brian Moore | Independent | 19695 | 0.41% | — |
| Floyd Ray Frazier | Independent | 16628 | 0.35% | — |
| Roy Tanner | Independent | 15562 | 0.32% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Bill Nelson (Democratic) 60.3%
▌Katherine Harris (Republican) 38.1%
Others
▌Belinda Noah (Independent) 0.5%
▌Brian Moore (Green) 0.4%
▌Floyd Ray Frazier (Independent) 0.3%
▌Roy Tanner (Independent) 0.3%
Sources & further reading
Hawaii — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Daniel Akaka | Democratic | 210330 | 61.40% | Elected |
| Cynthia Thielen | Republican | 126097 | 36.78% | — |
| Lloyd Mallan | Libertarian | 6415 | 1.90% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Daniel Akaka (Democratic) 61.4%
▌Cynthia Thielen (Republican) 36.8%
▌Lloyd Mallan (Libertarian) 1.9%
Sources & further reading
Indiana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Richard Lugar | Republican | 1171553 | 87.30% | Elected |
| Steve Osborn | Libertarian | 168820 | 12.59% | — |
| Write-Ins | No party | 738 | 0.10% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Richard Lugar (Republican) 87.3%
▌Steve Osborn (Libertarian) 12.6%
Sources & further reading
Maine — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Olympia Snowe | Republican | 402598 | 74.01% | Elected |
| Jean Hay Bright | Democratic | 111984 | 20.59% | — |
| Bill Slavick | Independent | 29220 | 5.37% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Olympia Snowe (Republican) 74.4%
▌Jean Hay Bright (Democratic) 20.5%
▌Bill Slavick (Independent) 5.2%
Sources & further reading
Maryland — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Ben Cardin | Democratic | 965477 | 54.21% | Elected |
| Michael S. Steele | Republican | 787182 | 44.20% | — |
| Kevin Zeese | Green | 27564 | 1.55% | — |
Incumbent retired. Democratic hold. Source candidate / selection detail: ▌Y Ben Cardin (Democratic) 54.2%
▌Michael Steele (Republican) 44.2%
▌Kevin Zeese (Green) 1.5%
Sources & further reading
Massachusetts — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Ted Kennedy | Democratic | 1500738 | 69.30% | Elected |
| Kenneth Chase | Republican | 661532 | 30.55% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Ted Kennedy (Democratic) 69.5%
▌Kenneth Chase (Republican) 30.5%
Sources & further reading
Michigan — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Debbie Stabenow | Democratic | 2151278 | 56.91% | Elected |
| Michael Bouchard | Republican | 1559597 | 41.26% | — |
| Leonard Schwartz | Libertarian | 27012 | 0.71% | — |
| David Sole | Green | 23890 | 0.63% | — |
| Dennis FitzSimons | Constitution | 18341 | 0.50% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Debbie Stabenow (Democratic) 56.9%
▌Mike Bouchard (Republican) 41.3%
Others
▌Leonard Schwartz (Libertarian) 0.7%
▌David Sole (Green) 0.6%
▌W. Dennis FitzSimons (Constitution) 0.5%
Sources & further reading
Minnesota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Amy Klobuchar | DFL | 1278849 | 58.06% | Elected |
| Mark Kennedy | Republican | — | 37.90% | — |
| Robert Fitzgerald | Independence | 71194 | 3.23% | — |
| Michael Cavlan | Green | — | 0.50% | — |
| Ben Powers | Constitution | 5408 | 0.25% | — |
Incumbent retired. Democratic (DFL) hold. Source candidate / selection detail: ▌Y Amy Klobuchar (DFL) 58.1%
▌Mark Kennedy (Republican) 37.9%
▌Robert Fitzgerald (Independence) 3.2%
Others
▌Michael Cavlan (Green) 0.5%
▌Ben Powers (Constitution) 0.3%
Sources & further reading
Mississippi — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Trent Lott | Republican | 388399 | 63.58% | Elected |
| Erik R. Fleming | Democratic | 213000 | 34.87% | — |
| Harold Taylor | Libertarian | 9522 | 1.56% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Trent Lott (Republican) 63.6%
▌Erik Fleming (Democratic) 34.8%
▌Harold Taylor (Libertarian)
1.5%
Sources & further reading
Missouri — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Claire McCaskill | Democratic | 1055255 | 49.58% | Elected |
| Jim Talent | Republican | 1006941 | 47.30% | — |
| Frank Gilmour | Libertarian | 47792 | 2.25% | — |
| Lydia Lewis | Progressive | 18383 | 0.86% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Claire McCaskill (Democratic) 49.6%
▌Jim Talent (Republican) 47.3%
Others
▌Frank Gilmour (Libertarian) 1.2%
▌Lydia Lewis (Green) 0.9%
Sources & further reading
Montana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jon Tester | Democratic | 199845 | 49.16% | Elected |
| Conrad Burns | Republican | 196283 | 48.29% | — |
| Stan Jones | Libertarian | 10377 | 2.55% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Jon Tester (Democratic) 49.2%
▌Conrad Burns (Republican) 48.3%
▌Stan Jones (Libertarian) 2.6%
Sources & further reading
Nebraska — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Ben Nelson | Democratic | 378388 | 63.88% | Elected |
| Pete Ricketts | Republican | 213928 | 36.12% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Ben Nelson (Democratic) 63.9%
▌Pete Ricketts (Republican) 36.1%
Sources & further reading
Nevada — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Ensign | Republican | 322501 | 55.36% | Elected |
| Jack Carter | Democratic | 238796 | 40.99% | — |
| None of These Candidates | 8232 | 1.41% | — | |
| David K. Schumann | Independent American Party (Nevada) | 7774 | 1.33% | — |
| Brendan Trainor | Libertarian | 5269 | 0.90% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John Ensign (Republican) 55.4%
▌Jack Carter (Democratic) 41.0%
Others
None of These Candidates 1.4%
▌David Schumann (Constitution) 1.3%
▌Brendan Trainor (Libertarian) 0.9%
Sources & further reading
New Jersey — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bob Menendez | Democratic | 1200843 | 53.30% | Elected |
| Thomas Kean, Jr. | Republican | 997775 | 44.30% | — |
| Len Flynn | Libertarian | 14637 | 0.65% | — |
| Edward Forchion | Marijuana | 11593 | 0.52% | — |
| J. M. Carter | Independent | 7918 | 0.35% | — |
| N. Leonard Smith | Independent | 6243 | 0.28% | — |
| Daryl Brooks | Independent | 5138 | 0.20% | — |
| Angela Lariscy | Socialist Workers | 3433 | 0.20% | — |
| Gregory Pason | Socialist | 2490 | 0.11% | — |
Interim appointee elected. Source candidate / selection detail: ▌Y Bob Menendez (Democratic) 53.4%
▌Thomas Kean Jr. (Republican) 44.3%
Others
▌Len Flynn (Libertarian) 0.7%
▌Ed Forchion (Marijuana) 0.5%
▌J. M. Carter (Independent) 0.4%
▌N. Leonard Smith (Independent) 0.3%
▌Daryl Brooks (Independent) 0.2%
▌Angela Lariscy (Socialist Workers) 0.2%
▌Greg Pason (Socialist) 0.1%
Sources & further reading
New Mexico — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jeff Bingaman | Democratic | 394365 | 70.61% | Elected |
| Allen McCulloch | Republican | 163826 | 29.33% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jeff Bingaman (Democratic) 70.6%
▌Allen McCulloch (Republican) 29.3%
Sources & further reading
New York — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Hillary Clinton | Democratic | — | 67.00% | Elected |
| John Spencer | Republican | — | 31.00% | — |
| Howie Hawkins | Green | 55469 | 1.18% | — |
| Jeff Russell | Libertarian | — | 0.40% | — |
| Bill Van Auken | Socialist Equality | — | 0.20% | — |
| Róger Calero | Socialist Workers | — | 0.20% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Hillary Clinton (Democratic) 67.0%
▌John Spencer (Republican) 31.0%
Others
▌Howie Hawkins (Green) 1.2%
▌Jeff Russell (Libertarian) 0.4%
▌Bill Van Auken (Socialist Equality) 0.2%
▌Róger Calero (Socialist Workers) 0.2%
Sources & further reading
North Dakota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Kent Conrad | Democratic–NPL | 150146 | 68.83% | Elected |
| Dwight Grotberg | Republican | 64417 | 29.53% | — |
| Roland Riemers | Independent | 2194 | 1.01% | — |
| James Germalic | Independent | 1395 | 0.64% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Kent Conrad (Democratic-NPL) 68.8%
▌Dwight Grotberg (Republican) 29.5%
Others
▌Roland Riemers (Independent) 1.0%
▌James Germalic (Independent) 0.6%
Sources & further reading
Ohio — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Sherrod Brown | Democratic | 2257369 | 56.16% | Elected |
| Mike DeWine | Republican | 1761037 | 43.82% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Sherrod Brown (Democratic) 56.2%
▌Mike DeWine (Republican) 43.8%
Sources & further reading
Pennsylvania — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bob Casey, Jr. | Democratic | 2392984 | 58.64% | Elected |
| Rick Santorum | Republican | 1684778 | 41.28% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Bob Casey Jr. (Democratic) 58.7%
▌Rick Santorum (Republican) 41.3%
Sources & further reading
Rhode Island — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Sheldon Whitehouse | Democratic | 206043 | 53.52% | Elected |
| Lincoln Chafee | Republican | 178950 | 46.48% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Sheldon Whitehouse (Democratic) 53.5%
▌Lincoln Chafee (Republican) 46.5%
Sources & further reading
Tennessee — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bob Corker | Republican | 929911 | 50.71% | Elected |
| Harold Ford, Jr. | Democratic | 879976 | 47.99% | — |
| Ed Choate | Independent | 10831 | 0.59% | — |
| David Gatchell | Independent | 3746 | 0.20% | — |
| Emory "Bo" Heyward | Independent | 3580 | 0.20% | — |
| H. Gary Keplinger | Independent | 3033 | 0.17% | — |
| Chris Lugo | Green | 2589 | 0.14% | — |
Incumbent retired. Republican hold. Source candidate / selection detail: ▌Y Bob Corker (Republican) 50.7%
▌Harold Ford Jr. (Democratic) 48.0%
Others
▌Ed Choate (Independent) 0.6%
▌David Gatchell (Independent) 0.2%
▌Emory "Bo" Heyward (Independent) 0.2%
▌H. Gary Keplinger (Independent) 0.2%
▌Chris Lugo (Green) 0.1%
Sources & further reading
Texas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Kay Bailey Hutchison | Republican | 2661789 | 61.69% | Elected |
| Barbara Ann Radnofsky | Democratic | 1555202 | 36.04% | — |
| Scott Jameson | Libertarian | 97672 | 2.26% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Kay Bailey Hutchison (Republican) 61.7%
▌Barbara Ann Radnofsky (Democratic) 36.0%
▌Scott Jameson (Libertarian) 2.3%
Sources & further reading
Utah — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Orrin Hatch | Republican | 356238 | 62.36% | Elected |
| Pete Ashdown | Democratic | 177459 | 31.06% | — |
| Scott Bradley | Constitution | 21526 | 3.77% | — |
| Roger Price | Personal Choice | 9089 | 1.59% | — |
| Dave Seely | Libertarian | 4428 | 0.78% | — |
| Julian Hatch | Green | 2512 | 0.44% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Orrin Hatch (Republican) 62.6%
▌Pete Ashdown (Democratic) 30.8%
▌Scott Bradley (Constitution) 3.8%
Others
▌Roger Price (Personal Choice) 1.6%
▌Dave Seely (Libertarian) 0.8%
▌Julian Hatch (Green) 0.4%
Sources & further reading
Vermont — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bernie Sanders | Independent | 171638 | 65.40% | Elected |
| Richard Tarrant | Republican | 84924 | 32.30% | — |
| Cris Ericson | Independent | 1735 | 0.66% | — |
| Craig Hill | Green | 1536 | 0.59% | — |
| Peter D. Moss | Independent | 1518 | 0.58% | — |
| Peter Diamondstone | Liberty Union | 801 | 0.31% | — |
Incumbent retired. Independent hold. Source candidate / selection detail: ▌Y Bernie Sanders (Independent) 65.4%
▌Richard Tarrant (Republican) 32.3%
Others
▌Cris Ericson (Independent) 0.6%
▌Craig Hill (Green) 0.5%
▌Peter Moss (Independent) 0.5%
▌Peter Diamondstone (Liberty Union) 0.3%
Sources & further reading
Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jim Webb | Democratic | 1175606 | 49.59% | Elected |
| George Allen | Republican | 1166277 | 49.20% | — |
| Gail Parker | Independent Greens | 26102 | 1.10% | — |
Incumbent lost re-election. Democratic gain. Source candidate / selection detail: ▌Y Jim Webb (Democratic) 49.6%
▌George Allen (Republican) 49.2%
▌Gail Parker (Independent Greens) 1.1%
Sources & further reading
Washington — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Maria Cantwell | Democratic | 1184659 | 56.85% | Elected |
| Mike McGavick | Republican | 832106 | 39.93% | — |
| Bruce Guthrie | Libertarian | 29331 | 1.41% | — |
| Aaron Dixon | Green | 21254 | 1.02% | — |
| Robin Adair | Independent | 16384 | 0.79% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Maria Cantwell (Democratic) 56.9%
▌Mike McGavick (Republican) 39.9%
Others
▌Bruce Guthrie (Libertarian) 1.4%
▌Aaron Dixon (Green) 1.0%
▌Robin Adair (Independent) 0.8%
Sources & further reading
West Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Robert Byrd | Democratic | 296276 | 64.40% | Elected |
| John Raese | Republican | 155043 | 33.70% | — |
| Jesse Johnson | Mountain | 8565 | 1.90% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Robert Byrd (Democratic) 64.4%
▌John Raese (Republican) 33.7%
▌Jesse Johnson (Mountain) 1.9%
Sources & further reading
Wisconsin — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Herb Kohl | Democratic | 1439214 | 67.31% | Elected |
| Robert Lorge | Republican | 630299 | 29.48% | — |
| Rae Vogeler | Green | 42434 | 1.98% | — |
| Ben Glatzel | Independent | 25096 | 1.17% | — |
| Scattered | Other | 1254 | 0.06% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Herb Kohl (Democratic) 67.3%
▌Robert Lorge (Republican) 29.5%
Others
▌Rae Vogeler (Green) 2.0%
▌Ben Glatzel (Independent) 1.2%
Sources & further reading
Wyoming — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Craig L. Thomas | Republican | 135174 | 69.99% | Elected |
| Dale Groutage | Democratic | 57671 | 29.86% | — |
| Write-ins | Write-in | 291 | 0.15% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Craig L. Thomas (Republican) 70.0%
▌Dale Groutage (Democratic) 29.9%
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 |
|---|---|---|---|---|
| Jon Kyl · Arizona | — | — | 1 | — |
| Dianne Feinstein · California | — | — | 1 | — |
| Joe Lieberman · Connecticut | — | — | 1 | — |
| Tom Carper · Delaware | — | — | 1 | — |
| Bill Nelson · Florida | — | — | 1 | — |
| Daniel Akaka · Hawaii | — | — | 1 | — |
| Richard Lugar · Indiana | — | — | 1 | — |
| Olympia Snowe · Maine | — | — | 1 | — |
| Ben Cardin · Maryland | — | — | 1 | — |
| Ted Kennedy · Massachusetts | — | — | 1 | — |
| Debbie Stabenow · Michigan | — | — | 1 | — |
| Amy Klobuchar · Minnesota | — | — | 1 | — |
| Trent Lott · Mississippi | — | — | 1 | — |
| Claire McCaskill · Missouri | — | — | 1 | — |
| Jon Tester · Montana | — | — | 1 | — |
| Ben Nelson · Nebraska | — | — | 1 | — |
| John Ensign · Nevada | — | — | 1 | — |
| Bob Menendez · New Jersey | — | — | 1 | — |
| Jeff Bingaman · New Mexico | — | — | 1 | — |
| Hillary Clinton · New York | — | — | 1 | — |
| Kent Conrad · North Dakota | — | — | 1 | — |
| Sherrod Brown · Ohio | — | — | 1 | — |
| Bob Casey, Jr. · Pennsylvania | — | — | 1 | — |
| Sheldon Whitehouse · Rhode Island | — | — | 1 | — |
| Bob Corker · Tennessee | — | — | 1 | — |
| Kay Bailey Hutchison · Texas | — | — | 1 | — |
| Orrin Hatch · Utah | — | — | 1 | — |
| Bernie Sanders · Vermont | — | — | 1 | — |
| Jim Webb · Virginia | — | — | 1 | — |
| Maria Cantwell · Washington | — | — | 1 | — |
| Robert Byrd · West Virginia | — | — | 1 | — |
| Herb Kohl · Wisconsin | — | — | 1 | — |
| Craig L. Thomas · 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