| NRCC | $82K | 68 | 2002, 2004, 2006 |
| REPUBLICAN NATIONAL COMMITTEE | $81K | 3 | 2002 |
| NATIONAL BEER WHOLESALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $60K | 20 | 2002, 2004, 2006, 2008, 2010, 2012 |
| AT&T INC. EMPLOYEE FEDERAL POLITICAL ACTION COMMITTEE (AT&T EMPLOYEE FEDERAL PAC) | $55K | 28 | 2002, 2004, 2006, 2008, 2010, 2012 |
| THE WILLIAMS COMPANIES, INC. POLITICAL ACTION COMMITTEE | $54K | 44 | 2002, 2004, 2006, 2008, 2010, 2012 |
| ASSOCIATED BUILDERS AND CONTRACTORS, INC. POLITICAL ACTION COMMITTEE (ABC PAC) | $46K | 17 | 2002, 2004, 2006, 2008, 2010, 2012 |
| AMERICAN ACADEMY OF OPHTHALMOLOGY INC POLITICAL COMMITTEE (OPHTHPAC) | $46K | 19 | 2002, 2004, 2006, 2008, 2010, 2012 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $45K | 23 | 2002, 2004, 2006, 2008, 2010, 2012 |
| AMERICAN DENTAL ASSOCIATION POLITICAL ACTION COMMITTEE | $44K | 25 | 2002, 2004, 2006, 2008, 2010, 2012 |
| THE AMERICAN ELECTRIC POWER COMMITTEE FOR RESPONSIBLE GOVERNMENT | $41K | 33 | 2002, 2004, 2006, 2008, 2010, 2012 |