| DCCC | $148K | 50 | 2002, 2004, 2008, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $141K | 26 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |
| AFL-CIO | $90K | 15 | 2002, 2000 |
| BLUE DOG POLITICAL ACTION COMMITTEE | $70K | 18 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $68K | 26 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $63K | 16 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |
| AMERICAN PHYSICAL THERAPY ASSOCIATION PHYSICAL THERAPY POLITICAL ACTION COMMITTEE (PT-PAC) | $61K | 36 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |
| UNITED STEELWORKERS POLITICAL ACTION FUND | $58K | 13 | 2010, 2002, 2006, 2004, 2008, 2000 |
| NATIONAL COMMUNITY PHARMACISTS ASSOCIATION - PAC | $56K | 32 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |
| UA UNION PLUMBERS & PIPEFITTERS VOTE! PAC (UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF THE PLUMBING & PIPEFITTING INDUSTRY OF THE UNITED STATES AND CANADA) | $55K | 16 | 2010, 2002, 2006, 2004, 2012, 2008, 2000 |