| DSCC | $281K | 14 | 1990, 2002, 1996, 1984, 2008 |
| MONTANA DEMOCRATIC PARTY | $129K | 29 | 1990, 2002, 1996 |
| AMERICAN ACADEMY OF OPHTHALMOLOGY INC POLITICAL COMMITTEE (OPHTHPAC) | $126K | 22 | 1990, 2002, 1996, 2014, 2006, 1988, 2012, 2008, 1986 |
| AMERICAN HOSPITAL ASSOCIATION PAC | $67K | 35 | 1990, 2002, 1996, 2006, 1984, 1988, 2012, 2008, 1986, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $64K | 23 | 2010, 1990, 2002, 1996, 2014, 2006, 1984, 1980, 2004, 2008, 2000 |
| AMERICAN MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | $62K | 21 | 1990, 2002, 1996, 2006, 1984, 1982 |
| NATIONAL ASSOCIATION OF INSURANCE AND FINANCIAL ADVISORS POLITICAL ACTION COMM | $56K | 41 | 2010, 1990, 2002, 1996, 1994, 2014, 2006, 1984, 1988, 1998, 1980, 2004, 2012, 2008, 1982, 2000 |
| AFLAC POLITICAL ACTION COMMITTEE (AFLAC PAC) | $55K | 24 | 1990, 2002, 1996, 2014, 2006, 1984, 1988, 1998, 2004, 2000 |
| AMERICAN BANKERS ASSOCIATION PAC (BANKPAC) | $55K | 19 | 1990, 2002, 1996, 1994, 2014, 1984, 1988, 1998, 2008, 2000 |
| AMERICAN HEALTH CARE ASSOCIATION POLITICAL ACTION COMMITTEE | $54K | 46 | 1990, 2002, 1996, 2006, 1984, 1980, 2012, 2008, 2000 |