| DCCC | $329K | 105 | 2008 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $194K | 15 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| INDIANA DEMOCRATIC CONGRESSIONAL VICTORY COMMITTEE | $114K | 291 | 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $95K | 19 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $90K | 20 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $87K | 20 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| MIDWEST REGION LABORERS' POLITICAL LEAGUE | $83K | 22 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $78K | 48 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| TRANSPORT WORKERS UNION OF AMERICA POLITICAL CONTRIBUTIONS COMMITTEE | $76K | 34 | 2010, 2024, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| UAW - V - CAP (UAW VOLUNTARY COMMUNITY ACTION PROGRAM) 'INT'L UNION UNITED AUTOMOBILE AEROSPACE & AGRICULTURAL IMPLEMENT WORKERS OF AMERICA UAW | $75K | 19 | 2010, 2024, 2014, 2020, 2016, 2012, 2022, 2008 |