| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $109K | 49 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $92K | 54 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2022, 2008, 2000 |
| UNION PACIFIC CORP. FUND FOR EFFECTIVE GOVERNMENT | $86K | 32 | 2010, 2002, 1994, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| AT&T INC. EMPLOYEE FEDERAL POLITICAL ACTION COMMITTEE (AT&T EMPLOYEE FEDERAL PAC) | $81K | 57 | 2010, 2002, 1996, 1994, 2014, 1992, 2020, 1998, 2016, 2012, 2018, 2008, 2000 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $78K | 48 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| ENGINEERS POLITICAL EDUCATION COMMITTEE (EPEC)/INTERNATIONAL UNION OF OPERATING ENGINEERS | $69K | 35 | 2010, 2002, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| BNSF RAILWAY COMPANY RAILPAC (BNSF RAILPAC) | $66K | 25 | 2010, 1996, 2014, 2006, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| NATIONAL AUTOMOBILE DEALERS ASSOCIATION POLITICAL ACTION COMMITTEE | $66K | 28 | 2002, 1996, 1994, 1992, 2020, 1998, 2016, 2004, 2018, 2008, 2000 |
| AMERICAN AIRLINES INC. POLITICAL ACTION COMMITTEE (AAPAC) | $65K | 54 | 2010, 2002, 1996, 1994, 2014, 2006, 1992, 2020, 1998, 2016, 2004, 2012, 2018, 2008, 2000 |
| TEXAS DEMOCRATIC PARTY | $65K | 14 | 2010, 2002, 2014, 2020, 1998, 2016, 2012 |