| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $74K | 17 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $69K | 43 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $65K | 19 | 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $64K | 22 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $61K | 26 | 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| AT&T INC. EMPLOYEE FEDERAL POLITICAL ACTION COMMITTEE (AT&T EMPLOYEE FEDERAL PAC) | $61K | 37 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $59K | 36 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| TRANSPORT WORKERS UNION OF AMERICA POLITICAL CONTRIBUTIONS COMMITTEE | $59K | 26 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $58K | 17 | 2010, 2014, 2020, 2016, 2012, 2018 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $55K | 21 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022 |