| DSCC | $110K | 5 | 2010, 1992 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $40K | 16 | 2010, 2002, 1992, 1998, 2004, 2008 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $40K | 11 | 2010, 2002, 2006, 1992, 1998, 2004, 2008 |
| NATIONAL ASSOCIATION OF LETTER CARRIERS OF U.S.A. POLITICAL FUND (LETTER CARRIER POLITICAL FUND) | $37K | 13 | 2010, 2002, 2006, 1992, 1998, 2004 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $35K | 17 | 1992, 1998, 2004 |
| CARPENTERS LEGISLATIVE IMPROVEMENT COMMITTEE UNITED BROTHERHOOD OF CARPENTERS AND JOINERS | $35K | 11 | 2010, 1992, 1998, 2004, 2000 |
| AIR LINE PILOTS ASSOCIATION PAC | $35K | 17 | 2010, 2002, 1992, 1998, 2004, 2008 |
| NATIONAL ASSOCIATION OF INSURANCE AND FINANCIAL ADVISORS POLITICAL ACTION COMM | $35K | 11 | 2010, 2002, 1992, 1998, 2004 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $33K | 13 | 2006, 1992, 1998, 2004, 2008 |
| SMART TD PAC | $31K | 17 | 2010, 1992, 1998, 2004, 2008 |