Most Prolific Cosponsors
| bioguide_id | full_name | party | state | chamber | bills_cosponsored | original_cosponsors |
|---|---|---|---|---|---|---|
| N000147 | Eleanor Holmes Norton | Democrat | DC | House | 17005 | 8032 |
| M000312 | James P. McGovern | Democrat | MA | House | 11773 | 4699 |
| R000053 | Charles B. Rangel | Democrat | NY | House | 11503 | 3869 |
| G000551 | Raúl M. Grijalva | Democrat | AZ | House | 10813 | 5081 |
| C000714 | John Conyers, Jr. | Democrat | MI | House | 10759 | 4057 |
| L000551 | Barbara Lee | Democrat | CA | House | 10571 | 5187 |
| F000339 | Barney Frank | Democrat | MA | House | 10254 | 3956 |
| S001145 | Janice D. Schakowsky | Democrat | IL | House | 10207 | 4609 |
| K000009 | Marcy Kaptur | Democrat | OH | House | 10188 | 3773 |
| T000326 | Edolphus Towns | Democrat | NY | House | 9764 | 3663 |
| M000133 | Edward J. Markey | Democrat | MA | Senate | 9746 | 4689 |
| J000032 | Sheila Jackson Lee | Democrat | TX | House | 9688 | 4150 |
| D000563 | Richard J. Durbin | Democrat | IL | Senate | 9207 | 5103 |
| F000392 | Jonas Frost | Democrat | TX | House | 8915 | 2683 |
| S000810 | Fortney Pete Stark | Democrat | CA | House | 8812 | 2707 |
| C001068 | Steve Cohen | Democrat | TN | House | 8355 | 3231 |
| L000397 | Zoe Lofgren | Democrat | CA | House | 8341 | 2433 |
| H000324 | Alcee L. Hastings | Democrat | FL | House | 8274 | 3276 |
| W000215 | Henry A. Waxman | Democrat | CA | House | 8224 | 2813 |
| L000287 | John Lewis | Democrat | GA | House | 8197 | 3028 |
| D000191 | Peter A. DeFazio | Democrat | OR | House | 8108 | 2754 |
| B000574 | Earl Blumenauer | Democrat | OR | House | 8066 | 3355 |
| B000711 | Barbara Boxer | Democrat | CA | Senate | 8025 | 3538 |
| M000087 | Carolyn B. Maloney | Democrat | NY | House | 7983 | 3374 |
| O000159 | Major Owens | Democrat | NY | House | 7942 | 2869 |
| W000779 | Ron Wyden | Democrat | OR | Senate | 7708 | 4344 |
| S000522 | Christopher H. Smith | Republican | NJ | House | 7617 | 2770 |
| N000002 | Jerrold Nadler | Democrat | NY | House | 7587 | 3403 |
| D000096 | Danny K. Davis | Democrat | IL | House | 7576 | 3344 |
| S000033 | Bernard Sanders | Independent | VT | Senate | 7479 | 3710 |
| B000944 | Sherrod Brown | Democrat | OH | Senate | 7448 | 4094 |
| S000148 | Charles E. Schumer | Democrat | NY | Senate | 7239 | 3784 |
| E000179 | Eliot L. Engel | Democrat | NY | House | 7236 | 2394 |
| M000404 | Jim McDermott | Democrat | WA | House | 7216 | 2850 |
| M000702 | Barbara A. Mikulski | Democrat | MD | Senate | 7151 | 3144 |
| K000172 | Dale E. Kildee | Democrat | MI | House | 7073 | 2158 |
| A000022 | Gary L. Ackerman | Democrat | NY | House | 7054 | 2488 |
| B000410 | Howard L. Berman | Democrat | CA | House | 7007 | 2628 |
| F000116 | Bob Filner | Democrat | CA | House | 6938 | 2232 |
| E000250 | Lane Evans | Democrat | IL | House | 6874 | 2083 |
| M001143 | Betty McCollum | Democrat | MN | House | 6858 | 2827 |
| M000725 | George Miller | Democrat | CA | House | 6856 | 2777 |
| S000480 | Louise McIntosh Slaughter | Democrat | NY | House | 6748 | 2086 |
| P000034 | Frank Pallone, Jr. | Democrat | NJ | House | 6678 | 2684 |
| R000383 | Robert Roe | Democrat | NJ | House | 6638 | 1904 |
| R000515 | Bobby L. Rush | Democrat | IL | House | 6591 | 2601 |
| R000011 | Nick J. Rahall II | Democrat | WV | House | 6533 | 1870 |
| N000179 | Grace F. Napolitano | Democrat | CA | House | 6491 | 2592 |
| L000090 | Tom Lantos | Democrat | CA | House | 6490 | 2451 |
| G000386 | Chuck Grassley | Republican | IA | Senate | 6477 | 3711 |
| D000216 | Rosa L. DeLauro | Democrat | CT | House | 6469 | 2598 |
| V000128 | Chris Van Hollen | Democrat | MD | Senate | 6399 | 3567 |
| B001230 | Tammy Baldwin | Democrat | WI | Senate | 6377 | 3273 |
| P000149 | Donald Payne | Democrat | NJ | House | 6344 | 2216 |
| B000490 | Sanford D. Bishop, Jr. | Democrat | GA | House | 6295 | 2184 |
| L000174 | Patrick J. Leahy | Democrat | VT | Senate | 6270 | 3503 |
| Y000033 | Don Young | Republican | AK | House | 6260 | 2120 |
| S000248 | José E. Serrano | Democrat | NY | House | 6256 | 2571 |
| L000020 | Robert Lagomarsino | Republican | CA | House | 6173 | 2077 |
| E000215 | Anna G. Eshoo | Democrat | CA | House | 6158 | 2184 |
| C001072 | André Carson | Democrat | IN | House | 6149 | 2601 |
| B001149 | Dan Burton | Republican | IN | House | 6132 | 2219 |
| M001160 | Gwen Moore | Democrat | WI | House | 6114 | 3033 |
| H000627 | Maurice D. Hinchey | Democrat | NY | House | 6113 | 2404 |
| O000006 | James Oberstar | Democrat | MN | House | 6055 | 2011 |
| C000567 | Thad Cochran | Republican | MS | Senate | 5981 | 2460 |
| C000141 | Benjamin L. Cardin | Democrat | MD | Senate | 5949 | 3132 |
| J000288 | Henry C. "Hank" Johnson, Jr. | Democrat | GA | House | 5893 | 2921 |
| F000062 | Dianne Feinstein | Democrat | CA | Senate | 5858 | 3553 |
| C001067 | Yvette D. Clarke | Democrat | NY | House | 5818 | 2876 |
| M001137 | Gregory W. Meeks | Democrat | NY | House | 5814 | 2506 |
| M000933 | James P. Moran | Democrat | VA | House | 5780 | 2029 |
| F000053 | Victor Fazio | Democrat | CA | House | 5755 | 1872 |
| G000212 | Benjamin Gilman | Republican | NY | House | 5748 | 1802 |
| S001150 | Adam B. Schiff | Democrat | CA | Senate | 5702 | 2164 |
| J000126 | Eddie Bernice Johnson | Democrat | TX | House | 5700 | 2224 |
| I000025 | Daniel K. Inouye | Democrat | HI | Senate | 5691 | 2577 |
| H000930 | William Hughes | Democrat | NJ | House | 5659 | 1359 |
| V000081 | Nydia M. Velázquez | Democrat | NY | House | 5637 | 2721 |
| W000672 | Frank R. Wolf | Republican | VA | House | 5612 | 2012 |
| L000480 | Nita M. Lowey | Democrat | NY | House | 5599 | 1662 |
| C001035 | Susan M. Collins | Republican | ME | Senate | 5574 | 3387 |
| B000619 | David Bonior | Democrat | MI | House | 5557 | 1453 |
| K000105 | Edward Kennedy | Democrat | MA | Senate | 5548 | 3067 |
| T000193 | Bennie G. Thompson | Democrat | MS | House | 5500 | 2258 |
| M000206 | Matthew Martínez | Republican | CA | House | 5498 | 1474 |
| W000738 | Lynn C. Woolsey | Democrat | CA | House | 5493 | 2012 |
| L000263 | Sander M. Levin | Democrat | MI | House | 5491 | 1943 |
| D000222 | Ronald Dellums | Democrat | CA | House | 5467 | 1497 |
| R000486 | Lucille Roybal-Allard | Democrat | CA | House | 5442 | 2049 |
| F000466 | Brian K. Fitzpatrick | Republican | PA | House | 5431 | 2380 |
| B001277 | Richard Blumenthal | Democrat | CT | Senate | 5400 | 3840 |
| M001111 | Patty Murray | Democrat | WA | Senate | 5357 | 3454 |
| M000249 | Robert Matsui | Democrat | CA | House | 5341 | 2031 |
| H000797 | Frank Horton | Republican | NY | House | 5340 | 1700 |
| P000523 | David E. Price | Democrat | NC | House | 5330 | 1274 |
| S000344 | Brad Sherman | Democrat | CA | House | 5325 | 1870 |
| K000148 | John F. Kerry | Democrat | MA | Senate | 5290 | 2795 |
| V000087 | Bruce Vento | Democrat | MN | House | 5276 | 1412 |
| W000800 | Peter Welch | Democrat | VT | Senate | 5252 | 2426 |