| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $90K | 32 | 2010, 2002, 1996, 2006, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $84K | 37 | 2010, 2002, 1996, 2014, 2006, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $83K | 49 | 2010, 2002, 1996, 2014, 2006, 1998, 2004, 2012, 2008, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $79K | 23 | 2010, 2002, 1996, 2006, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $78K | 38 | 2010, 2002, 1996, 2014, 2006, 1998, 2004, 2012, 2008, 2000 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $77K | 25 | 2010, 2002, 1996, 2006, 1998, 2004, 2012, 2008, 2000 |
| AMERICAN NURSES ASSOCIATION PAC | $77K | 50 | 2010, 2002, 1996, 2006, 1998, 2004, 2012, 2008, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $77K | 29 | 2010, 2002, 1996, 2006, 1998, 2004, 2012, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $76K | 25 | 2010, 2002, 1996, 2006, 1998, 2004, 2012, 2008, 2000 |
| INTERNATIONAL BROTHERHOOD OF BOILERMAKERS CAMPAIGN ASSISTANCE FUND | $69K | 50 | 2010, 2002, 1996, 2014, 2006, 1998, 2004, 2012, 2008, 2000 |