| NRCC | $993K | 14 | 2010 |
| NORTH DAKOTA DEMOCRATIC-NONPARTISAN LEAGUE PARTY | $269K | 169 | 2010, 2002, 2006, 2004, 2008 |
| CROSSROADS GRASSROOTS POLICY STRATEGIES | $248K | 2 | 2010 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $224K | 22 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2000 |
| DCCC | $199K | 88 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| AMERICAN MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | $130K | 15 | 2010, 1994, 2006, 2004, 2008, 2000 |
| AMERICAN HOSPITAL ASSOCIATION PAC | $126K | 48 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| NATIONAL ASSOCIATION OF INSURANCE AND FINANCIAL ADVISORS POLITICAL ACTION COMM | $100K | 41 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $93K | 30 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |
| NEA FUND FOR CHILDREN AND PUBLIC EDUCATION | $92K | 41 | 2010, 2002, 1996, 1994, 2006, 1992, 1998, 2004, 2008, 2000 |