| DSCC | $514K | 1 | 2016 |
| AMERICA'S CREDIT UNIONS PAC OF CREDIT UNION NATIONAL ASSOCIATION, INC. | $194K | 27 | 2010, 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| DAIRY FARMERS OF AMERICA, INC. POLITICAL ACTION COMMITTEE; AKA DFA-PAC | $73K | 25 | 2002, 1996, 2006, 1998, 2016, 2004, 2008, 2000 |
| AMEREN CORPORATION FEDERAL POLITICAL ACTION COMMITTEE (AMEREN FEDPAC) | $72K | 36 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $67K | 26 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| NATIONAL AUTOMOBILE DEALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $65K | 20 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| UNITED PARCEL SERVICE, INC. PAC (UPSPAC) | $61K | 28 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| NATIONAL RIFLE ASSOCIATION OF AMERICA POLITICAL VICTORY FUND | $57K | 35 | 2002, 1996, 2006, 1998, 2016, 2004, 2012, 2008, 2000 |
| OWNER-OPERATOR INDEPENDENT DRIVERS ASSN INC POLITICAL ACTION COMMITTEE (AKA OOIDA-PAC) | $55K | 30 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |
| ENTERPRISE HOLDINGS, INC. / ENTERPRISE MOBILITY POLITICAL ACTION COMMITTEE | $53K | 27 | 2002, 1996, 2006, 1998, 2004, 2008, 2000 |