| NATIONAL CONSERVATIVE POLITICAL ACTION COMMITTEE | $698K | 469 | 1984, 1982 |
| DSCC | $166K | 10 | 1994, 1984, 1988, 1982, 2000 |
| DEMOCRATIC STATE CENTRAL COMMITTEE OF MARYLAND | $52K | 16 | 1994, 1988, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $43K | 17 | 1994, 1988, 2004, 1982, 2000 |
| SEAFARERS POLITICAL ACTIVITY DONATION - SEAFARERS INTERNATIONAL UNION OF NA-AGLIW | $41K | 15 | 1994, 1988, 2004, 1982, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $40K | 14 | 1994, 1988, 1998, 1982, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $40K | 17 | 1994, 1988, 1982, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $39K | 13 | 1994, 1984, 1988, 1998, 1982, 2000 |
| UAW - V - CAP (UAW VOLUNTARY COMMUNITY ACTION PROGRAM) 'INT'L UNION UNITED AUTOMOBILE AEROSPACE & AGRICULTURAL IMPLEMENT WORKERS OF AMERICA UAW | $39K | 18 | 1994, 1988, 1998, 2004, 1982, 2000 |
| INVESTMENT COMPANY INSTITUTE POLITICAL ACTION COMMITTEE (ICI PAC) | $38K | 22 | 1994, 1988, 1998, 2004, 1982, 2000 |