| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $94K | 50 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 1998, 2016, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $87K | 32 | 2010, 2002, 1996, 1994, 2014, 2006, 1998, 2016, 2004, 2012, 2008, 2000 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $76K | 29 | 2010, 2002, 1996, 1994, 2014, 2006, 1998, 2016, 2004, 2012, 2008, 2000 |
| PENNSYLVANIA DEMOCRATIC PARTY | $75K | 4 | 1994, 2016, 2004 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $72K | 39 | 2010, 2002, 1996, 1994, 2014, 2006, 1998, 2016, 2004, 2012, 2008, 2000 |
| AMERICAN POSTAL WORKERS UNION COMMITTEE ON POLITICAL ACTION | $70K | 41 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 1998, 2016, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $68K | 46 | 2010, 2002, 1996, 1994, 2014, 2006, 1998, 2016, 2004, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $67K | 27 | 2010, 2002, 1996, 1994, 2014, 2006, 1998, 2004, 2012, 2008, 2000 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $61K | 31 | 2002, 1996, 1994, 2014, 2006, 1998, 2004, 2008, 2000 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $60K | 46 | 2010, 2002, 1996, 1994, 2014, 2006, 1998, 2016, 2004, 2012, 2008, 2000 |