| DCCC | $575K | 19 | 2010, 2006, 2008 |
| NRCC | $459K | 38 | 2006, 2008 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $30K | 8 | 2006, 2008 |
| SEIU UNITED HEALTH CARE WORKERS WEST | $26K | 4 | 2006 |
| CALIFORNIA LABOR FEDERATION, AFL-CIO | $23K | 1 | 2008 |
| COMMUNICATIONS WORKERS OF AMERICA - COPE POLITICAL CONTRIBUTIONS COMMITTEE | $20K | 6 | 2006, 2008 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $20K | 9 | 2010, 2006, 2008 |
| UNITED ASSOCIATION OF JOURNEYMEN & APPRENTICES OF THE U.S. & CANADA LOCAL 447 FEDERAL PAC | $18K | 5 | 2006, 2008 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $18K | 6 | 2006, 2008 |
| AFL-CIO COPE POLITICAL CONTRIBUTIONS COMMITTEE | $18K | 4 | 2006, 2008 |