| FUTURE45 | $1.7M | 7 | 2018 |
| DSCC | $97K | 5 | 2006 |
| VERMONT DEMOCRATIC PARTY | $50K | 62 | 2006 |
| TRANSPORT WORKERS UNION OF AMERICA POLITICAL CONTRIBUTIONS COMMITTEE | $35K | 11 | 2024, 2006, 2016, 2012, 2018 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $34K | 19 | 2010, 2024, 2014, 2006, 2012, 2018, 2008 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $30K | 9 | 2006, 2012, 2018, 2008 |
| AMERICAN POSTAL WORKERS UNION COMMITTEE ON POLITICAL ACTION | $28K | 7 | 2006, 2016, 2012, 2018 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $25K | 8 | 2024, 2006, 2012 |
| UNITE HERE TIP CAMPAIGN COMMITTEE | $25K | 5 | 2014, 2006, 2012 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $25K | 17 | 2010, 2014, 2006, 2016, 2012, 2018, 2008 |