| LOS ANGELES COUNTY FEDERATION OF LABOR, AFL-CIO | $131K | 5 | 2012 |
| COOPERATIVE OF AMERICAN PHYSICIANS INDEPENDENT EXPENDITURE COMMITTEE | $102K | 4 | 2012 |
| DCCC | $65K | 15 | 1998, 2012 |
| CARPENTERS LEGISLATIVE IMPROVEMENT COMMITTEE UNITED BROTHERHOOD OF CARPENTERS AND JOINERS | $40K | 8 | 2014, 1998, 2012 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $40K | 8 | 2014, 1998, 2012 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $38K | 18 | 2014, 1998, 2012 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $35K | 7 | 2014, 1998, 2012 |
| EDISON INTERNATIONAL PAC | $32K | 12 | 2014, 1998, 2012 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $31K | 12 | 2014, 1998, 2012 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $30K | 8 | 2014, 1998, 2012 |