| AMERICANS FOR TAX REFORM | $230K | 2 | 2010 |
| MOVEON.ORG POLITICAL ACTION | $166K | 9 | 2010, 2002, 2014, 2016, 2018 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $119K | 56 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $114K | 26 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |
| CAMPAIGN FOR COMMUNITY CHANGE | $113K | 3 | 2010 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $113K | 24 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $110K | 23 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2008 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $105K | 38 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $104K | 49 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $98K | 27 | 2010, 2002, 2024, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |