| DEMOCRATIC STATE CENTRAL COMMITTEE OF LA | $122K | 379 | 2002, 1994, 2008 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $74K | 41 | 1990, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $66K | 24 | 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $56K | 27 | 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $53K | 30 | 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $52K | 30 | 1990, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| NRCC | $51K | 6 | 2008 |
| UNITED PARCEL SERVICE, INC. PAC (UPSPAC) | $50K | 31 | 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2000 |
| UA UNION PLUMBERS & PIPEFITTERS VOTE! PAC (UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF THE PLUMBING & PIPEFITTING INDUSTRY OF THE UNITED STATES AND CANADA) | $49K | 21 | 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $47K | 15 | 1990, 2002, 2006, 1992, 2004, 2008 |