| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $60K | 16 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |
| AT&T INC. EMPLOYEE FEDERAL POLITICAL ACTION COMMITTEE (AT&T EMPLOYEE FEDERAL PAC) | $56K | 26 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $55K | 36 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $55K | 38 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $53K | 14 | 2010, 2014, 2020, 2016, 2012, 2018 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $50K | 16 | 2010, 2014, 2020, 2016, 2012, 2018 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $50K | 16 | 2010, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| FIRSTENERGY CORP POLITICAL ACTION COMMITTEE | $50K | 23 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $46K | 27 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $45K | 14 | 2010, 2014, 2020, 2016, 2012, 2018, 2008 |