| NRCC | $4.4M | 92 | 2010, 2006, 2012, 2008 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $864K | 49 | 2010, 2014, 2020, 2016, 2012, 2018, 2022, 2008 |
| DCCC | $648K | 135 | 2010, 2014, 2006, 2016, 2012, 2018, 2008 |
| US CHAMBER OF COMMERCE | $490K | 1 | 2012 |
| NATIONAL ASSOCIATION OF REALTORS | $127K | 19 | 2010, 2014, 2012, 2008 |
| SIERRA CLUB POLITICAL COMMITTEE | $91K | 34 | 2010, 2014, 2006, 2016, 2004, 2012, 2018, 2008 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $86K | 23 | 2010, 2014, 2006, 2020, 2016, 2004, 2012, 2018, 2022, 2008 |
| INTERNATIONAL ASSOCIATION OF SHEET METAL, AIR, RAIL AND TRANSPORTATION WORKERS POLITICAL ACTION LEAGUE | $83K | 32 | 2010, 2014, 2006, 2020, 2016, 2012, 2018, 2022, 2008 |
| INTERNATIONAL UNION OF PAINTERS AND ALLIED TRADES POLITICAL ACTION TOGETHER POLITICAL COMMITTEE | $83K | 26 | 2010, 2024, 2014, 2006, 2020, 2016, 2012, 2018, 2022, 2008 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $80K | 16 | 2010, 2014, 2006, 2020, 2016, 2012, 2018, 2008 |