| NRSC | $6.3M | 43 | 2008 |
| NATIONAL FEDERATION OF INDEPENDENT BUSINESS FEDERAL POLITICAL ACTION COMMITTEE | $856K | 2 | 2008 |
| INDEPENDENCE USA PAC | $513K | 1 | 2014 |
| AFL-CIO | $388K | 154 | 2014, 2008 |
| HOMETOWN FREEDOM ACTION NETWORK | $346K | 2 | 2014 |
| PLANNED PARENTHOOD OF MN ACTION FUND | $298K | 13 | 2008 |
| MINNESOTA DEMOCRATIC-FARMER-LABOR PARTY | $273K | 8 | 2014, 2008 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $186K | 13 | 2010, 2014, 2016, 2012, 2008 |
| GIFFORDS PAC | $161K | 3 | 2014 |
| ENVIRONMENT AMERICA INC. VOTER ACTION (ABBV. 'ENVIRONMENT AMERICA VOTER ACTION') | $135K | 3 | 2014, 2008 |