| DCCC | $858K | 77 | 2010, 2006, 2004, 2012, 2008 |
| NRCC | $310K | 22 | 2004 |
| EMILYS LIST | $178K | 57 | 2004 |
| AMERICA'S CREDIT UNIONS PAC OF CREDIT UNION NATIONAL ASSOCIATION, INC. | $103K | 17 | 2010, 2006, 2004, 2012, 2008 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $58K | 14 | 2010, 2014, 2006, 2004, 2012, 2008 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $55K | 15 | 2010, 2014, 2006, 2004, 2012, 2008 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $52K | 27 | 2010, 2014, 2006, 2004, 2012, 2008 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $50K | 16 | 2010, 2006, 2004, 2012, 2008 |
| UA UNION PLUMBERS & PIPEFITTERS VOTE! PAC (UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF THE PLUMBING & PIPEFITTING INDUSTRY OF THE UNITED STATES AND CANADA) | $48K | 11 | 2010, 2014, 2006, 2004, 2012, 2008 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $48K | 15 | 2010, 2006, 2004, 2012, 2008 |