| DCCC | $451K | 104 | 2002, 1996, 1994, 2006, 1992, 1984, 1998, 2004, 2000 |
| NRCC | $400K | 11 | 2004 |
| AMERICAN MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | $164K | 43 | 1990, 2002, 1996, 1994, 1992, 1984, 1988, 1998, 1980, 2004, 1986, 1982, 2000 |
| LEAGUE OF CONSERVATION VOTERS ACTION FUND | $102K | 6 | 1998 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $81K | 57 | 1990, 2002, 1996, 1994, 1992, 1984, 1988, 1998, 1980, 2004, 1986, 1982, 2000 |
| AMERICAN HOSPITAL ASSOCIATION PAC | $80K | 24 | 2002, 1996, 1994, 1992, 1998, 2004, 2000 |
| NATIONAL AUTOMOBILE DEALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $68K | 39 | 1990, 2002, 1996, 1994, 1992, 1984, 1988, 1998, 1980, 2004, 2000 |
| AMERICAN BANKERS ASSOCIATION PAC (BANKPAC) | $59K | 34 | 1990, 2002, 1996, 1994, 1992, 1984, 1988, 1998, 1980, 2004, 1986, 1982, 2000 |
| AMERICAN VETERINARY MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | $56K | 25 | 1990, 2002, 1996, 1994, 1992, 1984, 1988, 1998, 2004, 1986, 2000 |
| UNITED EGG ASSOCIATION EGGPAC | $54K | 24 | 2002, 1996, 1994, 1992, 1984, 1988, 1998, 2004, 2000 |