Huckabee
Gov. Mike Rounds (SD)  (Mar. 24, 2007)

U.S. Rep. Don Young (AK)  (Feb. 23, 2007)  +
U.S. Rep. John Boozman (AR-3)  (Feb. 23, 2007)
U.S. Rep. Duncan Hunter (CA-52) (Jan. 23, 2008; earlier was a candidate)
U.S. Rep. John Linder (GA-7)  (Nov. 11, 2007; switched from Romney)  +
U.S. Rep. Bob Inglis (SC-4)  (Nov. 21, 2007)
 

McCain
Gov. Arnold Schwarzenegger (CA)  (Jan. 31, 2008)
Gov. M. Jodi Rell (CT)  (Jan. 28, 2008)
Gov. Charlie Crist (FL)  (Jan. 26, 2008)
Gov. Mitch Daniels (IN)  (Feb. 22, 2007)
Gov. Tim Pawlenty (MN)  (Jan. 15, 2007)
Gov. Jon Huntsman, Jr. (UT)  (July 2006)
Gov. Jim Douglas (VT)  (Jan. 6, 2008)

U.S. Sen. Jon Kyl (AZ)  (Dec. 28, 2006; reported in the Arizona Republic)
U.S. Sen. Joe Lieberman (I-CT)  (Dec. 17, 2007)
U.S. Sen. Mel Martinez (FL)  (Jan. 25, 2008)
U.S. Sen. Saxby Chambliss (GA)  (Feb. 2, 2008)
U.S. Sen. Johnny Isakson (GA)  (Feb. 2, 2008)
U.S. Sen. Sam Brownback (KS)  (Nov. 7, 2007; earlier was a candidate) +
U.S. Sen. Olympia Snowe (ME)  (Jan. 29, 2007)  +
U.S. Sen. Susan Collins (ME)  (Jan. 29, 2007)
U.S. Sen. Trent Lott (MS)*
U.S. Sen. Pete Domenici (NM)  (Jan. 14, 2008)
U.S. Sen. Richard Burr (NC)  (Mar. 9, 2007)
U.S. Sen. Tom Coburn (OK)  (Jan. 16, 2008)
U.S. Sen. Gordon Smith (OR)  (Aug. 9, 2006)
U.S. Sen. Lindsey Graham (SC)
U.S. Sen. John Thune (SD)  (Feb. 19, 2007)
U.S. Sen. John Warner (VA)  (Feb. 26, 2007)
*Lott resigned effective Dec. 19, 2007.

U.S. Rep. Spencer Bachus (AL-6) (Jan. 25, 2007)  +
??U.S. Rep. Rick Renzi (AZ-1)  (see for ex. Jan. 10 article in The Hill; however Renzi, under investigation, is not on the list on McCain's website)
U.S. Rep. John Shadegg (AZ-3)  (The Hill reports Jan. 10, 2007 that "he hads been buttonholing fellow House Republicans on the Arizona senator's behalf")
U.S. Rep. Jeff Flake  (AZ-6) (Dec. 28, 2006; reported in Arizona Republic)
U.S. Rep. Dan Lungren (CA-3)  (Jan. 31, 2007)
U.S. Rep. Darrell Issa (CA-49)  (Feb. 2, 2008)
U.S. Rep. Christopher Shays (CT-4)  (Feb. 8, 2007)
U.S. Rep. Mike Castle (DE)  (Feb. 20, 2007)
U.S. Rep. Jeff Miller (FL-1)  (Jan. 24, 2008)
U.S. Rep. Ric Keller (FL-8)  (Feb. 6, 2007) +
U.S. Rep. Ileana Ros-Lehtinen (FL-18)  (Feb. 1, 2007) +
U.S. Rep. Lincoln Diaz-Balart (FL-21)  (Feb. 1, 2007)
U.S. Rep. Mario Diaz-Balart (FL-25)  (Feb. 1, 2007)
U.S. Rep. Peter Roskam (IL-6)  (Nov. 13, 2007)
U.S. Rep. Mark Kirk (IL-10)  (Jan. 31, 2007)
U.S. Rep. Ray LaHood (IL-18)  (for ex. Jan. 10 article in The Hill)
U.S. Rep. John Shimkus (IL-19)  (Jan. 31, 2007)
U.S. Rep. Fred Upton (MI-6)  (Jan. 31, 2007)
U.S. Rep. Chip Pickering (MS-3)  (Feb. 22, 2007)
U.S. Rep. Frank LoBiondo (NJ-2)  (Feb. 2, 2008; previously backed Giuliani)
U.S. Rep. Peter King (NY-3)  (Feb. 2, 2008; previously backed Giuliani)
U.S. Rep. Randy Kuhl (NY-29)  (Feb. 2, 2008)
U.S. Rep. Steven LaTourette (OH-14) (Feb. 7, 2007) +
U.S. Rep. Deborah Pryce (OH-15)  (Feb. 2, 2008)
U.S. Rep. Jim Gerlach (PA-6)  (Feb. 2, 2008; previously backed Giuliani)
U.S. Rep. Todd Platts (PA-19)  (Mar. 22, 2007)
U.S. Rep. Joe Wilson (SC-2)  (Jan. 22, 2008)
U.S. Rep. Tom Davis (VA-11)  (Jan. 15, 2008)

Romney
Gov. Matt Blunt (MO)  (Dec. 5, 2006)
Gov. Dave Heineman (NE)  (Dec. 13, 2007)
Gov. Don Carcieri (RI)  (Mar. 13, 2007)

U.S. Sen. Lisa Murkowski (AK)  (Feb. 2, 2008)
U.S. Sen. Wayne Allard (CO)  (Apr. 16, 2007)
U.S. Sen. Larry Craig (ID)  (Feb. 8, 2007) 
[Craig resigned campaign position Sept. 1, 2007]
U.S. Sen. Thad Cochran (MS)  (Jan. 23, 2008; previously backed FThompson)
U.S. Sen. Judd Gregg (NH)  (Oct. 29, 2007)
U.S. Sen. Jim DeMint (SC)  (Jan. 9, 2007)
U.S. Sen. Bob Bennett (UT)  (Feb. 8, 2007)
U.S. Sen. Orrin Hatch (UT) (Mar. 19, 2007)

U.S. Rep. Mike Rogers (AL-3)
U.S. Rep. Robert B. Aderholt (AL-4)  (Feb. 6, 2007)
U.S. Rep. Wally Herger (CA-2)  (Dec. 21, 2007)
U.S. Rep. Howard "Buck" McKeon (CA-25) (Jan. 17, 2007)
U.S. Rep. Dana Rohrabacher (CA-46)  (Jan. 22, 2008)
U.S. Rep. John Campbell (CA-48)
U.S. Rep. Brian Bilbray (CA-50)  (Jan. 31, 2007)
U.S. Rep. Tom Tancredo (CO-6)  (Dec. 20, 2007)
U.S. Rep Ander Crenshaw (FL-4)  (Jan. 21, 2008)
U.S. Rep. Ginny Brown-Waite (FL-5)
U.S. Rep. Connie Mack (FL-14)  (Oct. 17, 2007)
U.S. Rep. Tom Feeney (FL-24)  (Jan. 19, 2007)
U.S. Rep. Jack Kingston (GA-1)  (Dec. 18, 2007)
U.S. Rep. Lynn Westmoreland (GA-3)  (Jan. 31, 2008)
U.S. Rep. Tom Price (GA-6)
U.S. Rep. John Linder (GA-7)   (Feb. 6, 2007) 
U.S. Rep. Phil Gingrey (GA-11)
U.S. Rep. Mike Simpson (ID-2)
U.S. Rep. and Former Speaker Dennis Hastert (IL-14)*  (Jan. 23, 2007) +
U.S. Rep. Ed Whitfield (KY-1)  (Feb. 2, 2007)
U.S. Rep. Ron Lewis (KY-2)  (Feb. 2, 2007)
U.S. Rep. Hal Rogers (KY-5)  (Feb. 2, 2007) +
U.S. Rep. Jim McCrery (LA-4)  (Jan. 17, 2007) +, +
U.S. Rep. Rodney Alexander (LA-5)
U.S. Rep. Pete Hoekstra (MI-2)  (Jan. 24, 2007) +
U.S. Rep. Vernon Ehlers (MI-3)  (Aug. 14, 2007)
U.S. Rep. Dave Camp (MI-4)  (Jan. 17, 2007)
U.S. Rep. Joe Knollenberg (MI-9)  (Aug. 23, 2006...first to announce)
U.S. Rep. Mike Ferguson (NJ-7)  (Feb. 2, 2008)
U.S. Rep. Virginia Foxx (NC-5)  (Dec. 21, 2007)
U.S. Rep. Howard Coble (NC-6)  (Feb. 4, 2008)
U.S. Rep. Ralph Regula (OH-16)
U.S. Rep. Bill Shuster (PA-9)
U.S. Rep. John Duncan Jr. (TN-2)  (Duncan threw his support behind Romney in late Jan./early Feb. 2007, but on Mar. 19, 2007 was announced as a co-chair of Draft Fred Thompson and has said he will support Thompson if he gets in the race).
U.S. Rep. Marsha Blackburn (TN-7)  (announced as a senior advisor to Romney on Jan. 5, 2007; switched support to not-yet-announced probable candidate former Sen. Fred Thompson on May 25, 2007; re-annonced support on Jan. 28, 2008))
U.S. Rep. Mike Conaway (TX-11)  (Mar. 7, 2007)
U.S. Rep. Kay Granger (TX-12)  (Sept. 25, 2007)
U.S. Rep. Lamar Smith (TX-21)  (July 25, 2007)
U.S. Rep. John Carter (TX-31)  (Dec. 20, 2007)
U.S. Rep. Rob Bishop (UT-1)  (Feb. 1, 2008)
U.S. Rep. Chris Cannon (UT-3)  (Nov. 1, 2007)
U.S. Rep. Tom Petri (WI-6)  (Aug. 27, 2007)
*Hastert resigned effective Nov. 26, 2007.
 

Paul
none
                                         . . .
former
Giuliani
Gov. Rick Perry (TX)  (Oct. 17, 2007)  +

U.S. Sen. David Vitter (LA)  (Mar. 13, 2007)  +
U.S. Sen. Norm Coleman (MN)  (Nov. 1, 2007)
U.S. Sen. Kit Bond (MO)  (Nov. 2, 2007)

21 House members plus PR rep. as of October 22, 2007
U.S. Rep. George Radanovich (CA-19)  (Mar. 29, 2007)
U.S. Rep. Devin Nunes (CA-21)  (Feb. 9, 2007)
U.S. Rep. David Dreier (CA-26)  (Feb. 13, 2007)  +
U.S. Rep. Ed Royce (CA-40)  (Mar. 24, 2007)
U.S. Rep. Jerry Lewis (CA-41)  (Mar. 13, 2007)
U.S. Rep. Mary Bono (CA-45)  (reported by the Desert Sun [Palm Springs] on Jan. 24, 2007)
U.S. Rep. Jerry Weller (IL-11)  (July 30, 2007)
U.S. Rep. Judy Biggert (IL-13)  (July 30, 2007)
U.S. Rep. Charles Boustany (LA-7) (Mar. 26, 2007)
U.S. Rep. Candice Miller (MI-10) (Feb. 8, 2007)  +
U.S. Rep. Jo Ann Emerson (MO-8) (Oct. 22, 2007) 
U.S. Rep. Jon Porter (NV-3)  (Apr. 27, 2007)
U.S. Rep. Frank LoBiondo (NJ-2)  (Mar. 9, 2007)
U.S. Rep. Peter King (NY-3)  (Newsday, Jan. 30, 2007)
U.S. Rep. Vito Fossella (NY-13) (Newsday, Jan. 30, 2007)
U.S. Rep. Jim Walsh (NY-25)  (Mar. 7, 2007)
U.S. Rep. Phil English (PA-3)  (July 31, 2007)
U.S. Rep. Jim Gerlach (PA-6)  (July 31, 2007)
U.S. Rep. Charlie Dent (PA-15)  (Feb. 22, 2007)  +
U.S. Rep. Pete Sessions (TX-32) (Newsday, Jan. 30, 2007; announced Feb. 12, 2007)
U.S. Rep. Dave Reichert (WA-8)  (June 15, 2007)
and
U.S. Rep. Luis G. Fortuño (PR) (August 2, 2007)
 

F.Thompson
U.S. Sen. Thad Cochran (MS)  (Sept. 13, 2007)
U.S. Sen. Jim Inhofe (OK)  (Oct. 10, 2007) +
U.S. Sen. Lamar Alexander (TN)
U.S. Sen. Bob Corker (TN)

U.S. Rep. Jeff Miller (FL-1)  (May 15, 2007)
U.S. Rep. Adam Putnam (FL-12)  (June 5, 2007)
U.S. Rep. Dan Manzullo (IL-16)  (May 15, 2007)
U.S. Rep. Steve Buyer (IN-4)  (May 31, 2007)
U.S. Rep. Steve King (IA-5) (Dec. 17, 2007) +
U.S. Rep. Thaddeus McCotter (MI-11) (see June 21, 2007 The Hill)
U.S. Rep. Roger Wicker (MS-1)  (Sept. 6, 2007)
U.S. Rep. Lee Terry (NE-2)
U.S. Rep. John Sullivan (OK-1)  (Oct. 10, 2007)
U.S. Rep. Gresham Barrett (SC-3) (May 15, 2007/Sept. 25, 2007)
U.S. Rep. David Davis (TN-1)
U.S. Rep. John J. Duncan, Jr. (TN-2)*  (March 19, 2007)
U.S. Rep. Marsha Blackburn (TN-7)*  (May 25, 2007)
U.S. Rep. Zach Wamp (TN-3)  (Mar. 19, 2007) +
U.S. Rep. Louie Gohmert (TX-1) 
See. Jonathan Allen.  "Some House Backers of Thompson Are Starting to Lose the Faith."  CQ, Nov. 19, 2007.
 

Hunter
U.S. Rep. Terry Everett (AL-2) (Jan. 25, 2007)  +
U.S. Rep. Trent Franks (AZ-2)  (Oct. 30, 2006)  +
U.S. Rep. C.W. Bill Young (FL-10) (Feb. 2007)
U.S. Rep. Jim Saxton (NJ-3)
U.S. Rep. Ralph Hall (TX-4)  (from the start)
U.S. Rep. John Culberson (TX-7)
 

Tancredo
none
 

Brownback
U.S. Rep. Todd Tiahrt (KS-4)  (from the beginning of the campaign)
??U.S. Sen. Pat Roberts (KS)
 

Clinton
Gov. Mike Beebe (AR)  (Aug. 20, 2007)
Gov. Ruth Ann Minner (DE)  (Jan. 9, 2008; previously backed Biden)
Gov. John Baldacci (ME)  (Dec. 15, 2007)
Gov. Martin O'Malley (MD)  (April 9, 2007)
Gov. Jennifer Granholm (MI)  (Oct. 19, 2007)
Gov. Jon Corzine (NJ)  (April 2, 2007)
Gov. Eliot Spitzer (NY)  (May 14, 2007)
Gov. Ted Kulongoski (OR)  (Dec. 13, 2007)
Gov. Ted Strickland (OH)  (Nov. 9, 2007)
Gov. Ed Rendell (PA)  (Jan. 24, 2008)
and
Gov. Togiola T.A. Tulafono (AS)  (Jan. 11, 2008)

U.S. Sen. Mark Pryor (AR)  (June 22, 2007)
U.S. Sen. Dianne Feinstein (CA) (July 25, 2007)
U.S. Sen. Daniel Inouye (HI)  (May 25, 2007)
U.S. Sen. Evan Bayh (IN)  (Sept. 24, 2007)
U.S. Sen. Debbie Stabenow (MI)  (Sept. 14, 2007)
U.S. Sen. Barbara Mikulski (MD)  (April 24, 2007)
U.S. Sen. Bob Menendez (NJ)  (June 12, 2007)
U.S. Sen. Chuck Schumer (NY)  (Dec. 8, 2006 Daily News)
U.S. Sen. Sheldon Whitehouse (RI) (June 6, 2007)
U.S. Sen. Patty Murray (WA)  (Jan. 30, 2008)
U.S. Sen. Maria Cantwell (WA) (Dec. 31, 2007)

U.S. Rep. Marion Berry (AR-1)  (June 22, 2007)
U.S. Rep. Vic Snyder (AR-2)  (June 22, 2007)
U.S. Rep. Mike Ross (AR-4)  (June 22, 2007)
U.S. Rep. Ed Pastor (AZ-4)  (Jan. 20, 2008); previously backed Richardson)
U.S. Rep. Mike Thompson (CA-1)  (Jan. 14, 2008)
U.S. Rep. Doris Matsui (CA-5)  (May 16, 2007) +
U.S. Rep. Lynn Woolsey (CA-6)  (Dec. 27, 2007) +
U.S. Rep. Ellen Tauscher (CA-10) (July 18, 2007)
U.S. Rep. Tom Lantos (CA-12)  (early 2007)
U.S. Rep. Dennis Cardoza (CA-18) (Dec. 8, 2007)
U.S. Rep. Brad Sherman (CA-27)  (Nov. 27, 2007)
U.S. Rep. Hilda Solis (CA-32)  (Oct. 17, 2007)
U.S. Rep. Diane Watson (CA-33  (Sept. 27, 2007)
U.S. Rep. Lucille Roybal-Allard (CA-34)  (June 27, 2007)
U.S. Rep. Maxine Waters (CA-35)  (Jan. 29, 2008)
U.S. Rep. Jane Harman (CA-36)  (July 18, 2007)
U.S. Rep. Laura Richardson (CA-37) (Sept. 13, 2007)
U.S. Rep. Grace Napolitano (CA-38) (early 2007)
U.S. Rep. Joe Baca (CA-43)  (Jan. 22, 2008)
U.S. Rep. Loretta Sanchez (CA-47)  (Jan. 18, 2008)
U.S. Rep. Diana DeGette (CO-1)  (Nov. 26, 2007)
U.S. Rep. Corrine Brown (FL-3)  (June 25, 2007)
U.S. Rep. Kendrick Meek (FL-17)  (June 13, 2007)
U.S. Rep. Debbie Wasserman Schultz (FL-20)  (Feb. 20, 2007)
U.S. Rep. Alcee Hastings (FL-23)  (Feb. 20, 2007)
U.S. Rep. John Lewis (GA-5)  (Oct. 12, 2007)
U.S. Rep. David Scott (GA-13)  (Oct, 13, 2007)
U.S. Rep. Leonard Boswell (IA-3)  (Dec. 14, 2007)
U.S. Rep. C.A. Dutch Ruppersberger (MD-2) (June 13, 2007)
U.S. Rep. Richard Neal (MA-2)  (May 8, 2007) +
U.S. Rep. Jim McGovern (MA-3)  (Mar. 29, 2007)
U.S. Rep. Barney Frank (MA-4)  (Nov. 13, 2007)
U.S. Rep. Stephen Lynch (MA-9)  (Oct. 26, 2007)
U.S. Rep. Emanuel Cleaver II (MO-5) (Aug. 21, 2007)
U.S. Rep. Shelley Berkley (NV-1)  (Jan. 9, 2008)
U.S. Rep. Rob Andrews (NJ-1)  (April 2, 2007)
U.S. Rep. Frank Pallone, Jr. (NJ-6) (April 2, 2007)
U.S. Rep. Bill Pascrell (NJ-8)  (Aug. 16, 2007)
U.S. Rep. Donald Payne (NJ-10)  (Jan. 1, 2008)
U.S. Rep. Albio Sires (NJ-13)  (June 22, 2007)
...including all 23 NY Democratic House members
U.S. Rep. Tim Bishop (NY-1)
U.S. Rep. Steve Israel (NY-2)  (Dec. 8, 2006 Daily News)
U.S. Rep. Carolyn McCarthy (NY-4) (Dec. 8, 2006 Daily News)
U.S. Rep. Gary Ackerman (NY-5)
U.S. Rep. Gregory Meeks (NY-6)  (Dec. 8, 2006 Daily News)
U.S. Rep. Joseph Crowley (NY-7) (Dec. 8, 2006 Daily News)
U.S. Rep. Jerrold Nadler (NY-8)  (April 28, 2006)
U.S. Rep. Anthony Weiner (NY-9) (Dec. 8, 2006 Daily News)
U.S. Rep. Edolphus Towns (NY-10) (Dec. 8, 2006 Daily News)
U.S. Rep. Yvette Clarke (NY-11)  (July 10, 2007)
U.S. Rep. Nydia Velazquez (NY-12) (Dec. 8, 2006 Daily News)
U.S. Rep. Carolyn Maloney (NY-14) (Dec. 8, 2006 Daily News)
U.S. Rep. Charles Rangel (NY-15)  (March 4, 2007 "Fox News Sunday")
U.S. Rep. Jose Serrano (NY-16)  (Dec. 13, 2006 Daily News)
U.S. Rep. Eliot Engel (NY-17)  (Dec. 8, 2006 Daily News)
U.S. Rep. Nita Lowey (NY-18)  (Dec. 8, 2006 Daily News)
U.S. Rep. John Hall (NY-19)  (April 9, 2007)
U.S. Rep. Kirsten Gillibrand (NY-20)
U.S. Rep. Michael McNulty (NY-21) (Dec. 8, 2006 Daily News)
U.S. Rep. Maurice Hinchey (NY-22)(May 25, 2007)
U.S. Rep. Michael Arcuri (NY-24) (Jan. 20, 2007)
U.S. Rep. Brian Higgins (NY-27) (Dec. 8, 2006 Daily News)
U.S. Rep. Louise Slaughter (NY-28)
U.S. Rep. Stephanie Tubbs Jones (OH-11) (support for presidential run goes back several years)
U.S. Rep. Darlene Hooley (OR-5)  (Aug. 6, 2007)
U.S. Rep. Joe Sestak (PA-7)  (May 25, 2007)
U.S. Rep. Allyson Schwartz (PA-13) (Mar. 19, 2007)
U.S. Rep. Jim Langevin (RI-2)  (June 1, 2007)
U.S. Rep. Ruben Hinojosa (TX-15) (formally announced June 15, 2007; known earlier)
U.S. Rep. Silvestre Reyes (TX-16)  (Jan. 18, 2008; previously backed Richardson)
U.S. Rep. Sheila Jackson Lee (TX-18) (May 14, 2007)
U.S. Rep. Solomon Ortiz (TX-27)  (Feb. 1, 2008; previously backed Richardson)
U.S. Rep. Henry Cuellar (TX-28)  (June 15, 2007)
U.S. Rep. Gene Green (TX-29)  (Feb. 1, 2008; previously backed Richardson)
U.S. Rep. Jay Inslee (WA-1)  (June 21, 2007)
U.S. Rep. Tammy Baldwin (WI-2)  (Aug. 2, 2007)
and
Delegate to Congress Donna M. Christensen (USVI)  (Sept. 16, 2007)
 

Obama
Gov. Janet Napolitano (AZ)  (Jan. 11, 2008)
Gov. Rod Blagojevich (IL)  (Feb. 10, 2007) +
Gov. Kathleen Sebelius (KS)  (Jan. 29, 2008)
Gov. Deval Patrick (MA)  (reported Oct. 17, 2007; event Oct. 23)
Gov. Tim Kaine (VA)  (Feb. 17, 2007)
Gov. Jim Doyle (WI)  (Jan. 5, 2008)

U.S. Sen. Dick Durbin (IL)  (in Nov. 2006 Durbin posted a "Run, Barack, Run!" petition on his website)
U.S. Sen. Ted Kennedy (MA)  (Jan. 28, 2008) +
U.S. Sen. John Kerry (MA)  (Jan. 10, 2008)
U.S. Sen. Claire McCaskill (MO)  (Jan. 13, 2008)
U.S. Sen. Ben Nelson (NE)  (Jan. 12, 2008)
U.S. Sen. Kent Conrad (ND)  (Dec. 29, 2007)
U.S. Sen. Tim Johnson (SD)  (Jan. 9, 2008)
U.S. Sen. Patrick Leahy (VT)  (Jan. 17, 2008)

U.S. Rep. Artur Davis (AL-7)  (Jan. 16, 2007)
U.S. Rep. Raul Grijalva (AZ-7)  (Jan. 28, 2008; switched from Edwards to Obama)
U.S. Rep. George Miller (CA-7)  (Jan. 18, 2008) 
U.S. Rep. Barbara Lee (CA-9)  (Dec. 10, 2007) 
U.S. Rep. Anna Eshoo (CA-14 )  (Jan. 30, 2008; previously backed Dodd) 
U.S. Rep. Zoe Lofgren (CA-18)  (Jan. 14, 2008) 
U.S. Rep. Adam Schiff (CA-29)  (Jan. 9, 2008) 
U.S. Rep. Xavier Becerra (CA-31)  (Jan. 27, 2008; previously backed Dodd) 
U.S. Rep. Linda Sanchez (CA-39)  (Jan. 18, 2008) 
U.S. Rep. Ed Perlmutter (CO-7)  (Jan. 8, 2008)
U.S. Rep. John Larson (CT-1)  (Jan. 31, 2008; previously backed Dodd)
U.S. Rep. Rosa DeLauro (CT-3)  (Feb. 2, 2008; previously backed Dodd)
U.S. Rep. Chris Murphy (CT-5)  (Jan. 31, 2008; previously backed Dodd)
U.S. Rep. Robert Wexler (FL-19)  (Mar. 1, 2007)  +
U.S. Rep. Sanford Bishop (GA-2)  (Sept. 10, 2007)
U.S. Rep. Hank Johnson (GA-4)  (July 30, 2007)
U.S. Rep. Neil Abercrombie (HI-1) (from day one according to a spokesperson; Abercrombie knew Obama's family before he was born)
U.S. Rep. Dave Loebsack (IA-2) (Dec. 17, 2007) +
...including 8 out of the 10 IL Democratic House members
U.S. Rep. Bobby Rush (IL-1)  (reported by CBS News on Jan. 27, 2007)
U.S. Rep. Jesse L. Jackson Jr. (IL-2)
U.S. Rep. Luis V. Gutierrez (IL-4)
U.S. Rep. Danny Davis (IL-7)
U.S. Rep. Melissa Bean (IL-8)
U.S. Rep. Jan Schakowsky (IL-9)
U.S. Rep. Jerry Costello (IL-12)
U.S. Rep. Phil Hare (IL-17)
U.S. Rep. Elijah Cummings (MD-7)
U.S. Rep. Michael Capuano (MA-8)  (Jan. 28, 2008)
U.S. Rep. Bill Delahunt (MA-10) (Dec. 27, 2007) +
U.S. Rep. John Conyers (MI-14)  (May 12, 2007)
U.S. Rep. Rep. Betty McCollum (MN-4)  (reported by Minnesota Public Radio on Dec. 12, 2007)
U.S. Rep. Keith Ellison (MN-5)  (reported by the Star Tribune on Feb. 20, 2007)
U.S. Rep. Jim Oberstar (MN-8)  (Feb. 1, 2008)
U.S. Rep. Bennie Thompson (MS-2)  (Jan. 22, 2008)
U.S. Rep. William Lacy Clay (MO-1)  (May 11, 2007)
U.S. Rep. Russ Carnahan (MO-3)  (May 11, 2007; first reported by the St. Louis American on May 9)
U.S. Rep. Carol Shea-Porter (NH-1) (Dec. 11, 2007) +
U.S. Rep. Paul Hodes (NH-2)  (July 26, 2007)  +
U.S. Rep. Steve Rothman (NJ-9)  (July 25, 2007)
U.S. Rep. G.K Butterfield (NC-1)  (Jan. 11, 2008; switched from Edwards to Obama)
U.S. Rep. Earl Pomeroy (ND)  (Jan. 31, 2008)
U.S. Rep. Earl Blumenauer (OR-3)  (Feb. 1, 2008)
U.S. Rep. Chaka Fattah (PA-2)  (Dec. 18, 2007)
U.S. Rep. Patrick Murphy (PA-8)  (Aug. 21, 2007)
U.S. Rep. Patrick Kennedy (RI-1)  (Jan. 28, 2008)
U.S. Rep. Jim Cooper (TN-5)
U.S. Rep. Steve Cohen (TN-9)  (Feb. 4, 2008)
U.S. Rep. Al Green (TX-9)  (see for example the Houston Chronicle June 26, 2007)
U.S. Rep. Peter Welch (VT)  (Jan. 17, 2008)
U.S. Rep. Robert C. "Bobby" Scott (VA-3) (Dec. 20, 2007)
U.S. Rep. Rick Boucher (VA-9)  (Jan. 21, 2008)
U.S. Rep. Adam Smith (WA-9)  (Feb. 2007)
U.S. Rep. Gwen Moore (WI-4)  (reported by The Milwaukee Journal Sentinel on April 22, 2007)
and 
Delegate to Congress Eni Faleomavaega (AS)
                                         . . .
former
Biden
Gov. Ruth Ann Minner (DE)  +

U.S. Sen. Tom Carper (DE)
 

Dodd
9 House members; includes 4 from Connecticut
U.S. Rep. Anna Eshoo (CA-14)
U.S. Rep. Sam Farr (CA-17)  (see Aug. 23, 2007 Hollister Free Lance)
U.S. Rep. Xavier Becerra (CA-31) (is a national co-chair)
U.S. Rep. John Larson (CT-1)  (from the time of his announcement)
U.S. Rep. Joe Courtney (CT-2)  (from the time of his announcement)
U.S. Rep. Rosa DeLauro (CT-3) (from the time of his announcement)
U.S. Rep. Chris Murphy (CT-5)   (Jan. 12, 2007)
U.S. Rep. Tim Ryan (OH-17)  (Oct. 4, 2007)
U.S. Rep. Patrick Kennedy (RI-1) (Feb. 5, 2007) +
 

Edwards
14 House members when he withdrew
U.S. Rep. Raul Grijalva (AZ-7) (...wrote ea. Feb. 2007 letter to DNC members; switched to Obama on Jan. 29, 2008)
U.S. Rep. Bruce Braley (IA-1)  (Dec. 3, 2007) +
U.S. Rep. Mike Michaud (ME-2)  (Oct. 19, 2007)
U.S. Rep. Bart Stupak (MI-1)  (April 21, 2007 at the Michigan Democratic Party's Jefferson-Jackson Day Dinner)
U.S. Rep. Jim Oberstar (MN-8)  (Mar. 29, 2007)

...including endorsements of all seven NC Democratic congressmen announced Mar. 8, 2007
U.S. Rep. G.K Butterfield (NC-1)  (switched to Obama on Jan. 11, 2008)
U.S. Rep. Bob Etheridge (NC-2)
U.S. Rep. David Price (NC-4)
U.S. Rep.  Mike McIntyre (NC-7)
U.S. Rep.  Heath Shuler (NC-11)
U.S. Rep.  Mel Watt (NC-12)
U.S. Rep. Brad Miller (NC-13)

U.S. Rep. Stephanie Herseth Sandlin (SD) (April 16, 2007) +
U.S. Rep. Charlie Gonzalez (TX-20)  (Mar. 7, 2007) +
U.S. Rep. Eddie Bernice Johnson (TX-30) (...wrote Jan. 31, 2007 letter to DNC members)
U.S. Rep. David Obey (WI-7)  (Mar. 27, 2007)
 

Kucinich
none
 

Richardson
U.S. Sen. Jeff Bingaman (NM)  (reported by Albuquerque Tribune on Jan. 22, 2007)

U.S. Rep. Ed Pastor (AZ-4)  (May 2, 2007)
U.S. Rep. Tom Udall (NM-3)  (reported by Albuquerque Tribune on Jan. 22, 2007)
U.S. Rep. Mike Doyle (PA-14)  (announced June 14, 2007)
U.S. Rep. Silvestre Reyes (TX-16) (announced May 18, 2007)
U.S. Rep. Solomon Ortiz (TX-27)  (announced June 14, 2007)
U.S. Rep. Gene Green (TX-29) (announced May 18, 2007)