1. Akaka, Daniel (D-HI)
  2. Begich, Mark (D-AK)
  3. Boxer, Barbara (D-CA)
  4. Brown, Sherrod (D-OH)
  5. Burris, Roland (D-IL)
  6. Byrd, Robert (D-WV)
  7. Cantwell, Maria (D-WA)
  8. Cardin, Benjamin (D-MD)
  9. Carper, Thomas (D-DE)
  10. Casey, Bob (D-PA)
  11. Dodd, Christopher (D-CT)
  12. Durbin, Richard (D-IL)
  13. Feingold, Russell (D-WI)
  14. Franken, Al (D-MN)
  15. Gillibrand, Kirsten (D-NY)
  16. Harkin, Tom (D-IA)
  17. Inouye, Daniel (D-HI)
  18. Johnson, Tim (D-SD)
  19. Kaufman, Edward (D-DE)
  20. Kennedy, Edward (D-MA)—Sponsor
  21. Kerry, John (D-MA)
  22. Klobuchar, Amy (D-MN)
  23. Lautenberg, Frank (D-NJ)
  24. Leahy, Patrick (D-VT)
  25. Levin, Carl (D-MI)
  26. Lieberman, Joseph (I-CT)
  27. Menendez, Robert (D-NJ)
  28. Merkley, Jeff (D-OR)
  29. Mikulski, Barbara (D-MD)
  30. Murray, Patty (D-WA)
  31. Nelson, Bill (D-FL)
  32. Reed, Jack (D-RI)
  33. Reid, Harry (D-NV)
  34. Rockefeller, Jay (D-WV)
  35. Sanders, Bernard (I-VT)
  36. Schumer, Charles (D-NY)
  37. Shaheen, Jeanne (D-NH)
  38. Stabenow, Debbie (D-MI)
  39. Udall, Tom (D-NM)
  40. Whitehouse, Sheldon (D-RI)
  41. Wyden, Ron (D-OR)