| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $102K | 44 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $100K | 43 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2012, 2008, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $94K | 37 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2012, 2008, 2000 |
| UAW - V - CAP (UAW VOLUNTARY COMMUNITY ACTION PROGRAM) 'INT'L UNION UNITED AUTOMOBILE AEROSPACE & AGRICULTURAL IMPLEMENT WORKERS OF AMERICA UAW | $88K | 57 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $85K | 41 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2012, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $77K | 35 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| CARPENTERS LEGISLATIVE IMPROVEMENT COMMITTEE UNITED BROTHERHOOD OF CARPENTERS AND JOINERS | $73K | 28 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $70K | 38 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $62K | 45 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $61K | 31 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |