| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $118K | 42 | 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $108K | 49 | 1992, 1994, 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024, 2026 |
| SMART TD PAC | $94K | 27 | 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $92K | 26 | 1990, 1992, 1998, 2000, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| CARPENTERS LEGISLATIVE IMPROVEMENT COMMITTEE UNITED BROTHERHOOD OF CARPENTERS AND JOINERS | $81K | 23 | 1990, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2018, 2020, 2022, 2024 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $78K | 45 | 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| ENGINEERS POLITICAL EDUCATION COMMITTEE (EPEC)/INTERNATIONAL UNION OF OPERATING ENGINEERS | $73K | 22 | 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $70K | 37 | 1992, 1996, 1998, 2000, 2002, 2004, 2006, 2008, 2012, 2014, 2016, 2018, 2020, 2022 |
| AMERICAN POSTAL WORKERS UNION COMMITTEE ON POLITICAL ACTION | $68K | 33 | 1990, 1992, 1994, 1998, 2000, 2002, 2004, 2006, 2008, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| AMALGAMATED TRANSIT UNION - COPE | $62K | 21 | 1992, 1994, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024, 2026 |