| DSCC | $913K | 50 | 1990, 1996, 1992, 1984 |
| MICHIGAN DEMOCRATIC STATE CENTRAL COMMITTEE | $155K | 24 | 1990, 2002, 1996, 1984, 1980 |
| AFL-CIO | $54K | 16 | 1990, 1996, 1984, 2008 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $51K | 13 | 1990, 2002, 1996, 1984, 2012, 2008 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $51K | 16 | 1990, 2002, 1996, 1984, 1980, 2008 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $50K | 12 | 1990, 2002, 1996, 1984, 2008 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $50K | 16 | 1990, 2002, 1996, 2006, 1984, 2008 |
| THE DESERT CAUCUS | $50K | 10 | 1990, 2002, 1996, 1984, 2008 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $50K | 21 | 1990, 2002, 1996, 2006, 1984, 2008 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $48K | 27 | 1990, 2002, 1996, 1984, 1980, 2008 |