Democrats participating in 2008-S2555 | ||
| Shelley Berkley | s1o | Nevada Democrat |
| Howard Berman | s1o | California Democrat |
| Earl Blumenauer | s1o | Oregon Democrat |
| Barbara Boxer | s1p | CA Democratic incumbent |
| Maria Cantwell | s1o | WA Democrat Jr Senator |
| Lois Capps | s1o | California Democrat |
| Benjamin Cardin | s1o | Maryland Democrat |
| Dennis Cardoza | s1o | California Democrat |
| Russ Carnahan | s1o | Missouri Democrat |
| Yvette Clarke | s1o | New York Democrat |
| Hillary Clinton | s1o | NY Democrat Jr Senator |
| Joe Courtney | s1o | Connecticut Democrat |
| Joseph Crowley | s1o | New York Democrat |
| Susan Davis | s1o | California Democrat |
| Peter Defazio | s1o | Oregon Democrat |
| Diana DeGette | s1o | Colorado Democrat |
| Rosa DeLauro | s1o | Connecticut Democrat |
| Lloyd Doggett | s1o | Texas Democrat (Re-elected 2006) |
| Richard Durbin | s1o | IL Democrat Sr Senator |
| Keith Ellison | s1o | Minnesota Democrat |
| Eliot Engel | s1o | New York Democrat/Liberal |
| Anna Eshoo | s1o | California Democrat |
| Sam Farr | s1o | California Democrat |
| Dianne Feinstein | s1o | CA Democrat Sr Senator |
| Bob Filner | s1o | California Democrat |
| Barney Frank | s1o | Massachusetts Democrat |
| Raul Grijalva | s1o | Arizona Democrat |
| John Hall | s1o | New York Democrat |
| Jane Harman | s1o | California Democrat |
| Maurice Hinchey | s1o | New York Dem./Ind./Lib./Working-Fam. |
| Paul Hodes | s1o | New Hampshire Democrat |
| Rush Holt | s1o | New Jersey Democrat |
| Daniel Inouye | s1o | HI Democratic incumbent |
| Jay Inslee | s1o | Washington Democrat |
| Patrick Kennedy | s1o | Rhode Island Democrat |
| John Kerry | s1o | MA Democrat Jr Senator |
| Amy Klobuchar | s1o | MN DFL challenger, Hennepin County Attorney |
| Dennis Kucinich | s1o | Ohio Democrat |
| James Langevin | s1o | Rhode Island Democrat |
| John Larson | s1o | Connecticut Democrat |
| Frank Lautenberg | s1o | NJ Democrat Sr Senator |
| Patrick Leahy | s1o | VT Democratic incumbent |
| Barbara Lee | s1o | California Democrat |
| Joseph Lieberman | s1o | CT Democratic Jr Senator; Gore's VP nominee; ran for Pres. 2004 |
| Zoe Lofgren | s1o | California Democrat |
| Nita Lowey | s1o | New York Democrat |
| Doris Matsui | s1o | California Democrat |
| Betty McCollum | s1o | Minnesota Democrat |
| Jim McDermott | s1o | Washington Democrat |
| Jerry McNerney | s1o | California Democrat |
| Robert Menendez | s1o | New Jersey Democrat |
| Michael Michaud | s1o | Maine Democrat |
| Barbara Mikulski | s1o | MD Democratic incumbent |
| Brad Miller | s1o | North Carolina Democrat |
| George Miller | s1o | California Democrat |
| James Moran | s1o | Virginia Democrat |
| Patty Murray | s1o | WA Democratic incumbent |
| Jerrold Nadler | s1o | New York Dem./Lib./Working-Families |
| Grace Napolitano | s1o | California Democrat |
| Bill Nelson | s1o | FL Democrat Sr Senator |
| Barack Obama | s1o | IL Democratic Jr Senator |
| John Olver | s1o | Massachusetts Democrat |
| Donald Payne | s1o | New Jersey Democrat |
| Jack Reed | s1o | RI Democrat Sr Senator |
| Lucille Roybal-Allard | s1o | California Democrat |
| Linda Sanchez | s1o | California Democrat |
| Loretta Sanchez | s1o | California Democrat |
| John Sarbanes | s1o | Maryland Democrat |
| Adam Schiff | s1o | California Democrat |
| Charles Schumer | s1o | NY Democratic incumbent |
| Jose Serrano | s1o | New York Democrat/Liberal |
| Carol Shea-Porter | s1o | New Hampshire Democrat |
| Brad Sherman | s1o | California Democrat |
| Albio Sires | s1o | New Jersey Democrat |
| Hilda Solis | s1o | California Democrat |
| Ellen Tauscher | s1o | California Democrat |
| Mike Thompson | s1o | California Democrat |
| Chris Van Hollen | s1o | Maryland Democrat |
| Henry Waxman | s1o | California Democrat |
| Peter Welch | s1p | Vermont Democrat |
| Robert Wexler | s1o | Florida Democrat |
| Sheldon Whitehouse | s1o | RI Democratic Jr Senator, previously attorney general |
| Lynn Woolsey | s1o | California Democrat |
| David Wu | s1o | Oregon Democrat |
| Ron Wyden | s1o | OR Democratic incumbent |
Republicans participating in 2008-S2555 | ||
| Susan Collins | s1o | ME Republican Jr Senator |
| David Dreier | s1o | California Republican |
| Christopher Shays | s1o | Connecticut Republican |
| Olympia Snowe | s1o | ME Republican Sr Senator |
| John Warner | s1o | VA Republican Sr Senator |
Independents participating in 2008-S2555 |
| Democrats:
85
Republicans: 5 Independents: 0 |