| INTERNATIONAL LONGSHOREMEN'S ASSOCIATION COMMITTEE ON POLITICAL EDUCATION | $110K | 24 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024, 2026 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $98K | 42 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024, 2026 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $94K | 22 | 2004, 2006, 2008, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $88K | 25 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024, 2026 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $62K | 24 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2022, 2024, 2026 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $60K | 34 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| UNITED STEELWORKERS POLITICAL ACTION FUND | $55K | 11 | 2004, 2006, 2008, 2010, 2012, 2016, 2018, 2020, 2022 |
| AT&T INC. EMPLOYEE FEDERAL POLITICAL ACTION COMMITTEE (AT&T EMPLOYEE FEDERAL PAC) | $53K | 22 | 2004, 2006, 2008, 2010, 2012, 2014, 2016 |
| UA UNION PLUMBERS & PIPEFITTERS VOTE! PAC (UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF THE PLUMBING & PIPEFITTING INDUSTRY OF THE UNITED STATES AND CANADA) | $51K | 13 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2024 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $46K | 14 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024, 2026 |