| DCCC | $131K | 86 | 1984, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| AMERICAN MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | $92K | 40 | 1980, 1982, 1984, 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $81K | 57 | 1980, 1982, 1984, 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| NATIONAL AUTOMOBILE DEALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $68K | 39 | 1980, 1984, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| AMERICAN BANKERS ASSOCIATION PAC (BANKPAC) | $59K | 34 | 1980, 1982, 1984, 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| AMERICAN VETERINARY MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | $56K | 25 | 1984, 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| UNITED EGG ASSOCIATION EGGPAC | $54K | 24 | 1984, 1988, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| TEXAS FARM BUREAU AGFUND | $51K | 27 | 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| DAIRY FARMERS OF AMERICA, INC. POLITICAL ACTION COMMITTEE; AKA DFA-PAC | $51K | 39 | 1982, 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |
| NATIONAL RURAL ELECTRIC COOPERATIVE ASSOCIATION AMERICA'S ELECTRIC COOPERATIVES PAC | $50K | 46 | 1980, 1982, 1984, 1986, 1992, 1994, 1996, 1998, 2000, 2002, 2004 |