| SIERRA CLUB POLITICAL COMMITTEE | $60K | 51 | 2010, 1990, 2014, 2006, 1992, 1984, 2004, 2012, 2008, 1982, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $60K | 13 | 2010, 2014, 2006, 2016, 2004, 2008 |
| EMPLOYEES OF RTX CORPORATION POLITICAL ACTION COMMITTEE | $43K | 23 | 2010, 2006, 1980, 2016, 2004, 2008 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $42K | 24 | 2010, 2014, 2006, 1984, 2020, 2004, 2018, 2008, 1986, 1982 |
| NCTA - THE INTERNET & TELEVISION ASSOCIATION POLITICAL ACTION COMMITTEE (NCTAPAC) | $42K | 12 | 2010, 2006, 1984, 1980, 2004, 2008, 1982 |
| DNC SERVICES CORP / DEMOCRATIC NATIONAL COMMITTEE | $40K | 1 | 2014 |
| T-MOBILE US, INC./SPRINT CORPORATION POLITICAL ACTION COMMITTEE | $39K | 19 | 2010, 2014, 2006, 2004, 2008 |
| DLA PIPER LLP (US) POLITICAL ACTION COMMITTEE (DLA PIPER PAC) | $38K | 15 | 2010, 2014, 2006, 2016, 2004, 2008 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $38K | 18 | 2010, 2014, 2006, 1980, 2004, 2008, 1982 |
| COMCAST CORPORATION & NBCUNIVERSAL POLITICAL ACTION COMMITTEE - FEDERAL | $37K | 16 | 2010, 2006, 2004, 2008 |