| DCCC | $115K | 62 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $111K | 23 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $85K | 22 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| WASHINGTON STATE LABOR COUNCIL, AFL - CIO | $67K | 27 | 1996, 1998, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $63K | 14 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $62K | 26 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $59K | 25 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $57K | 17 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| UNITED FOOD AND COMMERCIAL WORKERS INTERNATIONAL UNION ACTIVE BALLOT CLUB | $53K | 29 | 2002, 1996, 2006, 1998, 2004, 2000 |
| UAW - V - CAP (UAW VOLUNTARY COMMUNITY ACTION PROGRAM) 'INT'L UNION UNITED AUTOMOBILE AEROSPACE & AGRICULTURAL IMPLEMENT WORKERS OF AMERICA UAW | $53K | 25 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |