| ACTBLUE | 8557982 | 7742172 | 10171380 |
| DNC SERVICES CORPORATION/DEMOCRATIC NATIONAL COMMITTEE | 7493452 | 6276751 | 6963853 |
| REPUBLICAN NATIONAL COMMITTEE | 7148265 | 6939611 | 10025258 |
| DEMOCRATIC CONGRESSIONAL CAMPAIGN COMMITTEE | 6432419 | 4246311 | 34410591 |
| NATIONAL REPUBLICAN CONGRESSIONAL COMMITTEE | 5128557 | 4357648 | 24773236 |
| NATIONAL ASSOCIATION OF REALTORS CONGRESSIONAL FUND | 2500323 | 211887 | 3267693 |
| CLUB FOR GROWTH ACTION | 1676985 | 357050 | 2962700 |
| EMILY'S LIST | 1273487 | 1969870 | 2011714 |
| NATIONAL RIFLE ASSOCIATION OF AMERICA POLITICAL VICTORY FUND | 1252560 | 142033 | 13282099 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | 1212167 | 1001721 | 15460914 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | 1179450 | 598248 | 4659699 |
| SENATE CONSERVATIVES FUND | 920029 | 675022 | 1216299 |
| AMERICAN FEDERATION OF STATE COUNTY & MUNICIPAL EMPLOYEES P E O P L E | 775639 | 424797 | 5148936 |
| DEMOCRATIC STATE CENTRAL COMMITTEE OF CA - FEDERAL | 721447 | 335777 | 1277149 |
| USW WORKS | 648881 | 300000 | 534194 |
| REPUBLICAN PARTY OF FLORIDA | 648827 | 447280 | 1754791 |
| DEMOCRATIC EXECUTIVE COMMITTEE OF FLORIDA | 632055 | 575742 | 348921 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | 606505 | 443000 | 5767420 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATION | 590133 | 559979 | 2366112 |