| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $114K | 32 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $102K | 39 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $102K | 40 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $91K | 37 | 2010, 2002, 1994, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $90K | 48 | 2010, 2002, 1996, 1994, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $86K | 36 | 2010, 2002, 1996, 1994, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $86K | 42 | 2010, 2002, 1996, 1994, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $85K | 52 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| NATIONAL AIR TRAFFIC CONTROLLERS ASSOCIATION PAC | $83K | 52 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 2016, 2012, 2018, 2008 |
| AMERICAN CRYSTAL SUGAR COMPANY POLITICAL ACTION COMMITTEE | $69K | 26 | 2010, 1996, 1994, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008 |