Note added 2015_03_01: While updating the Senate cosponsorship leader board through the end of February, it became apparent to me that an error on congress.gov was replicated in my data for S.J.Res. 8, . . . providing for congressional disapproval . . . of the rule submitted by the National Labor Relations Board relating to representation case procedures. It appears that congress.gov entered each original cosponsor twice, and each subsequent cosponsor once. This made it appear as though the bill had 95 cosponsors, all of the Republican, which clearly cannot be, and I should have caught that. The error was flagged to LOC by web comment form on 2015_03_01. It is corrected for purposes of http://218and51.com on the cosponsor leader board posted on March 1, but is not corrected below. — Adam
| Rank | Bill | Cosponsors | Author | Title | Status |
| 1 | SRES 19 | Total: 99 53 R 44 D 2 I |
Mitch McConnell (R-KY) | A resolution relative to the death of Edward W. Brooke, III, former United States Sen… | Passed Senate |
| 1 | SRES 38 | Total: 99 53 R 44 D 2 I |
Mitch McConnell (R-KY) | A resolution relative to the death of Wendell H. Ford, former United States Senator f… | Passed Senate |
| 1 | SRES 82 | Total: 99 53 R 44 D 2 I |
Mitch McConnell (R-KY) | A resolution commending Kathleen Alvarez Tritak on her service to the United States S… | Passed Senate |
| 4 | SJRES 8 | Total: 94 94 R 0 D 0 I |
Lamar Alexander (R-TN) | A joint resolution providing for congressional disapproval under chapter 8 of title 5… | Introduced |
| 5 | S 1 | Total: 59 53 R 6 D 0 I |
John Hoeven (R-ND) | Keystone XL Pipeline Approval Act | Passed House |
| 6 | SJRES 6 | Total: 53 53 R 0 D 0 I |
Orrin G. Hatch (R-UT) | A joint resolution proposing an amendment to the Constitution of the United States re… | Introduced |
| 7 | S 167 | Total: 52 20 R 30 D 2 I |
John McCain (R-AZ) | Clay Hunt SAV Act | Introduced |
| 8 | SRES 76 | Total: 50 50 R 0 D 0 I |
John Cornyn (R-TX) | A resolution welcoming the Prime Minister of Israel to the United States for his addr… | Introduced |
| 8 | S 336 | Total: 50 50 R 0 D 0 I |
Ted Cruz (R-TX) | A bill to repeal the Patient Protection and Affordable Care Act and the Health Care a… | Introduced |
| 10 | S 339 | Total: 47 47 R 0 D 0 I |
Ted Cruz (R-TX) | ObamaCare Repeal Act | Introduced |
| 11 | SRES 25 | Total: 45 0 R 43 D 2 I |
Ron Wyden (D-OR) | A resolution commemorating 50 years since the creation of the Medicare and Medicaid P… | Introduced |
| 12 | S 29 | Total: 44 0 R 42 D 2 I |
Dianne Feinstein (D-CA) | Respect for Marriage Act | |
| 13 | S 229 | Total: 42 0 R 40 D 2 I |
Sheldon Whitehouse (D-RI) | DISCLOSE Act of 2015 | Introduced |
| 14 | S 404 | Total: 41 41 R 0 D 0 I |
Marco Rubio (R-FL) | A bill to amend title 18, United States Code, to prohibit taking minors across State … | Introduced |
| 14 | S 431 | Total: 41 30 R 11 D 0 I |
John Thune (R-SD) | A bill to permanently extend the Internet Tax Freedom Act. | Introduced |
| 16 | S 269 | Total: 38 30 R 8 D 0 I |
Mark Kirk (R-IL) | A bill to expand sanctions imposed with respect to Iran and to impose additional sanc… | Introduced |
| 17 | SJRES 5 | Total: 37 0 R 35 D 2 I |
Tom Udall (D-NM) | A joint resolution proposing an amendment to the Constitution of the United States re… | Introduced |
| 17 | S 295 | Total: 37 20 R 17 D 0 I |
Orrin G. Hatch (R-UT) | A bill to amend section 2259 of title 18, United States Code, and for other purposes. | Introduced |
| 19 | S 283 | Total: 36 36 R 0 D 0 I |
Jeff Flake (R-AZ) | A bill to prohibit the Internal Revenue Service from modifying the standard for deter… | Introduced |
| 20 | S 30 | Total: 35 33 R 2 D 0 I |
Susan M. Collins (R-ME) | Forty Hours Is Full Time Act of 2015 | |
| 20 | S 141 | Total: 35 35 R 0 D 0 I |
John Cornyn (R-TX) | Protecting Seniors’ Access to Medicare Act of 2015 | Introduced |
| 22 | SRES 37 | Total: 33 0 R 31 D 2 I |
Barbara Boxer (D-CA) | A resolution supporting women’s reproductive health care decisions. | Introduced |
| 23 | S 217 | Total: 32 0 R 31 D 1 I |
Richard Blumenthal (D-CT) | A bill to protect a woman’s right to determine whether and when to bear a child or en… | Introduced |
| 24 | S 226 | Total: 31 31 R 0 D 0 I |
Rand Paul (R-KY) | A bill to amend chapter 8 of title 5, United States Code, to provide that major rules… | Introduced |
| 24 | S 366 | Total: 31 8 R 21 D 2 I |
Jon Tester (D-MT) | A bill to require Senate candidates to file designations, statements, and reports in … | Introduced |