| FILANGIERI SOCIETY FOR JUSTICE AND GOOD GOVERNMENT | $153K | 12 | 2008 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $109K | 63 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2012, 2008, 1986, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $99K | 33 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1988, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $94K | 45 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2008, 1986, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $89K | 55 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2012, 2008, 1986, 2000 |
| NATIONAL ASSOCIATION OF LETTER CARRIERS OF U.S.A. POLITICAL FUND (LETTER CARRIER POLITICAL FUND) | $87K | 46 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2012, 2008, 1986, 2000 |
| AMERICAN POSTAL WORKERS UNION COMMITTEE ON POLITICAL ACTION | $78K | 44 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2008, 1986, 2000 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $75K | 49 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2012, 2008, 1986, 2000 |
| NATIONAL ACTIVE AND RETIRED FEDERAL EMPLOYEES ASSOCIATION POLITICAL ACTION COM (NARFE-PAC) | $73K | 36 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2012, 2008, 1986, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $69K | 44 | 2010, 1990, 2002, 1996, 1994, 2006, 1992, 1984, 1988, 1998, 2004, 2008, 1986, 2000 |