| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $93K | 21 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $92K | 33 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| AIR LINE PILOTS ASSOCIATION PAC | $88K | 42 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $86K | 45 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $80K | 49 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| HONEYWELL INTERNATIONAL INC. TECHNOLOGIES PUBLIC AFFAIRS COUNCIL (HONPAC) | $79K | 38 | 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| UNITED STEELWORKERS POLITICAL ACTION FUND | $77K | 19 | 2004, 2006, 2008, 2012, 2014, 2016, 2018, 2020, 2022 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | $74K | 47 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $74K | 27 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |
| LABORERS' INTERNATIONAL UNION OF NORTH AMERICA (LIUNA) PAC | $72K | 24 | 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022 |