Please see the list below of those who signed (please note that some DU supporters in the House and Senate did not sign because they are members of the Appropriations Committees).
Alaska
Rep. Don Young
Sen. Lisa Murkowski
Alabama
Rep. Terry Everett
Arkansas
Rep. John Boozman
Rep. Mike Ross
Rep. Vic Snyder
Sen. Blanche Lincoln
Sen. Mark Pryor
Arizona
Rep. Raul Grijalva
California
Rep. Jim Costa
Rep. Howard Berman
Rep. Dan Lungren
Rep. Mary Bono
Rep. Dennis Cardoza
Rep. George Miller
Rep. Jerry McNerney
Rep. Grace Flores Napolitano
Rep. Lois Capps
Rep. Doris Matsui
Rep. Mike Thompson
Rep. Anna Eshoo
Rep. Henry Waxman
Rep. Ellen Tauscher
Rep. Pete Stark
Rep. Duncan Hunter
Sen. Barbara Boxer
Colorado
Rep. Mark Udall
Rep. John Salazar
Rep. Diana DeGette
Sen. Ken Salazar
Connecticut
Rep. Rosa DeLauro
Rep. Joe Courtney
Rep. Christopher Shays
Sen. Joseph Lieberman
Sen. Chris Dodd
Delaware
Sen. Joseph Biden
District of Columbia
Delegate Eleanor Holmes Norton
Florida
Rep. Robert Wexler
Rep. Alcee Hastings
Rep. Jeff Miller
Rep. Adam Putnam
Rep. Kathy Castor
Sen. Bill Nelson
Sen. Mel Martinez
Georgia
Rep. Henry Johnson
Rep. David Scott
Sen. Saxby Chambliss
Sen. Johnny Isakson
Hawaii
Rep. Neil Abercrombie
Rep. Mazie Hirono
Sen. Daniel Akaka
Idaho
Sen. Mike Crapo
Iowa
Rep. Leonard Boswell
Rep. David Loebsack
Sen. Tom Harkin
Illinois
Rep. Jerry Weller
Sen. Barack Obama
Sen. Richard Durbin
Indiana
Rep. Mark Souder
Sen. Richard Lugar
Kansas
Rep. Dennis Moore
Rep. Jerry Moran
Sen. Pat Roberts
Louisiana
Rep. Charles Melançon
Sen. David Vitter
Sen. Mary Landrieu
Maine
Rep. Thomas Allen
Rep. Mike Michaud
Sen. Susan Collins
Sen. Olympia Snowe
Maryland
Rep. Wayne Gilchrest
Rep. John Sarbanes
Rep. Elijah Cummings
Sen. Ben Cardin
Massachusetts
Rep. Barney Frank
Rep. James McGovern
Rep. William Delahunt
Sen. John Kerry
Sen. Edward Kennedy
Michigan
Rep. John Dingell
Rep. Thad McCotter
Rep. Sander Levin
Rep. Mike Rogers
Rep. Dale Kildee
Rep. Bart Stupak
Rep. Vernon Ehlers
Rep. Candice Miller
Sen. Carl Levin
Sen. Debbie Stabenow
Minnesota
Rep. John Kline
Rep. Jim Ramstad
Rep. Jim Oberstar
Rep. Tim Walz
Sen. Norm Coleman
Sen. Amy Klobuchar
Missouri
Rep. Ike Skelton
Rep. Emanuel Cleaver
Rep. William Lacy Clay
Sen. Christopher “Kit” Bond
Mississippi
Rep. Charles Pickering
Rep. Bennie Thompson
Sen. Roger Wicker
Montana
Sen. Max Baucus
Sen. Jon Tester
Nevada
Rep. Shelley Berkley
Sen. John Ensign
Nebraska
Rep. Adrian Smith
Rep. Jeff Fortenberry
Sen. Chuck Hagel
New Hampshire
Rep. Carol Shea-Porter
Rep. Paul Hodes
Sen. John Sununu
New Jersey
Rep. Jim Saxton
Rep. Christopher Smith
Rep. Frank LoBiondo
New Mexico
Rep. Steve Pearce
Sen. Jeff Bingaman
New York
Rep. Edolphus Towns
Rep. Anthony Weiner
Rep. Carolyn Maloney
Rep. Charles Rangel
Rep. John McHugh
Rep. Michael McNulty
Rep. Gregory Meeks
Rep. Jerrold Nadler
Rep. Timothy Bishop
Sen. Hillary Clinton
Sen. Charles Schumer
North Carolina
Rep. Howard Coble
Rep. Robin Hayes
Rep. Brad Miller
Rep. Walter Jones
Rep. Bob Etheridge
Rep. Mike McIntyre
Rep. David Price
Sen. Elizabeth Dole
North Dakota
Rep. Earl Pomeroy
Ohio
Rep. Betty Sutton
Rep. Zack Space
Rep. Dennis Kucinich
Rep. Charlie Wilson
Sen. Sherrod Brown
Oklahoma
Rep. Dan Boren
Oregon
Rep. Earl Blumenauer
Rep. David Wu
Rep. Peter DeFazio
Sen. Ron Wyden
Pennsylvania
Rep. Chris Carney
Rep. Tim Holden
Rep. Mike Doyle
Rep. Phil English
Rep. Jim Gerlach
Rhode Island
Rep. Jim Langevin
Rep. Patrick Kennedy
Sen. Jack Reed
Sen. Sheldon Whitehouse
South Carolina
Rep. Henry Brown
Sen. Lindsey Graham
South Dakota
Rep. Stephanie Herseth-Sandlin
Sen. John Thune
Tennessee
Rep. Steve Cohen
Rep. David Davis
Rep. Marsha Blackburn
Sen. Bob Corker
Texas
Rep. Solomon Ortiz
Rep. Ron Paul
Rep. Pete Sessions
Rep. Sheila Jackson-Lee
Rep. Ruben Hinojosa
Rep. Nick Lampson
Rep. Gene Green
Rep. Chet Edwards
Rep. Al Green
Rep. Charles Gonzalez
Sen. John Cornyn
Utah
Rep. Jim Matheson
Vermont
Rep. Peter Welch
Sen. Bernie Sanders
Sen. Patrick Leahy
Virginia
Rep. Robert Scott
Rep. Robert Wittman
Rep. Rick Boucher
Rep. James Moran
Rep. Thelma Drake
Sen. John Warner
Sen. James Webb
Washington
Rep. Jay Inslee
Rep. Brian Baird
Rep. Jim McDermott
Sen. Maria Cantwell
Wisconsin
Rep. Thomas Petri
Rep. Ron Kind
Rep. Tammy Baldwin
Sen. Herb Kohl
Sen. Russell Feingold
West Virginia
Rep. Nick Rahall
Wyoming
Rep. Barbara Cubin
Sen. Michael Enzi
Sen. John Barrasso