| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $63K | 19 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $60K | 14 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $55K | 19 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |
| AMERICAN POSTAL WORKERS UNION COMMITTEE ON POLITICAL ACTION | $55K | 23 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $53K | 14 | 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020 |
| AMERICAN CRYSTAL SUGAR COMPANY POLITICAL ACTION COMMITTEE | $50K | 12 | 2008, 2010, 2012, 2014, 2016, 2018 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $50K | 37 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $48K | 21 | 2006, 2008, 2010, 2012, 2014, 2016 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $47K | 28 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |
| D.R.I.V.E. - DEM, REP, IND VOTER ED (THE PAC OF THE INT'L BRHD OF TEAMSTERS) | $43K | 21 | 2006, 2008, 2010, 2012, 2014, 2016, 2018 |