| DSCC | $246K | 33 | 1986, 1992, 1994, 2000, 2006 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $65K | 15 | 1986, 1988, 1990, 1992, 1994, 2000, 2004, 2006 |
| AMERICAN CRYSTAL SUGAR COMPANY POLITICAL ACTION COMMITTEE | $58K | 37 | 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004, 2008, 2010 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $54K | 21 | 1986, 1990, 1992, 1994, 1998, 2000, 2004, 2008 |
| NATIONAL ASSOCIATION OF LETTER CARRIERS OF U.S.A. POLITICAL FUND (LETTER CARRIER POLITICAL FUND) | $52K | 25 | 1986, 1988, 1990, 1992, 1994, 1998, 2000, 2004, 2006 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $50K | 21 | 1986, 1990, 1992, 1994, 1998, 2000, 2002, 2004, 2006 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $50K | 19 | 1986, 1990, 1992, 1994, 1996, 2000, 2004, 2006 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $49K | 14 | 1986, 1990, 1992, 1994, 2000, 2004, 2006, 2008 |
| NATIONAL RURAL ELECTRIC COOPERATIVE ASSOCIATION AMERICA'S ELECTRIC COOPERATIVES PAC | $48K | 20 | 1986, 1990, 1992, 1994, 1998, 2000, 2004, 2006, 2010 |
| AMERICAN HOSPITAL ASSOCIATION PAC | $47K | 28 | 1986, 1988, 1990, 1992, 1994, 1998, 2000, 2004, 2006, 2008, 2010 |