| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $65K | 17 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $60K | 16 | 2002, 1996, 2006, 1998, 2004, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $60K | 16 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $54K | 20 | 2002, 1996, 2006, 1998, 2004, 2000 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $53K | 15 | 2010, 2002, 1996, 2006, 1998, 2004, 2000 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $52K | 29 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $52K | 26 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| NATIONAL AUTOMOBILE DEALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $47K | 13 | 2010, 2002, 2006, 1998, 2004, 2008, 2000 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $46K | 18 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $45K | 13 | 2002, 1996, 2006, 1998, 2004, 2000 |