| CARPENTERS LEGISLATIVE IMPROVEMENT COMMITTEE UNITED BROTHERHOOD OF CARPENTERS AND JOINERS | $95K | 21 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $94K | 21 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| NATIONAL AUTOMOBILE DEALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $85K | 26 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| COMMUNICATION WORKERS OF AMERICA LOCAL 13000 | $83K | 19 | 2010, 2002, 2014, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $83K | 27 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $74K | 28 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2018, 2008, 2000 |
| INTERNATIONAL UNION OF PAINTERS AND ALLIED TRADES POLITICAL ACTION TOGETHER POLITICAL COMMITTEE | $70K | 19 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $68K | 28 | 2010, 2002, 2014, 2006, 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) | $66K | 23 | 2010, 2002, 2014, 2006, 1998, 2016, 2012, 2018, 2008, 2000 |
| TRANSPORT WORKERS UNION OF AMERICA POLITICAL CONTRIBUTIONS COMMITTEE | $64K | 23 | 2010, 2002, 2014, 2006, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |