Since 2010, one party’s House yes share was 11.4% or less
Source. House Clerk, SSA History; party yes share of those voting on final House passage
Method and data
Method. Independents who caucus with the Democrats are counted with Democrats. Shown for the 11 laws with a party table from the Clerk or the SSA. The 1964 act is excluded because its party split was read once, from Voteview’s vote data, and not cross-checked; Clean Air, Tax Reform, the 1956 highway act and CARES have no House party table.
| Law | Chamber | Vote | Democrats yes | Democrats no | Republicans yes | Republicans no | Less supportive party | Less supportive party’s yes share (%) | In the exhibit |
|---|---|---|---|---|---|---|---|---|---|
| Social Security 1935 | House | April 19, 1935 | 284 | 15 | 81 | 15 | R | 84.4 | yes |
| Social Security 1935 | Senate | June 19, 1935 | 60 | 1 | 16 | 5 | R | 76.2 | no |
| Civil Rights 1964 | House | July 2, 1964 | 153 | 91 | 136 | 35 | D | 62.7 | no |
| Civil Rights 1964 | Senate | June 19, 1964 | 46 | 21 | 27 | 6 | D | 68.7 | no |
| Medicare 1965 | House | July 27, 1965 | 237 | 48 | 70 | 68 | R | 50.7 | yes |
| Medicare 1965 | Senate | July 28, 1965 | 57 | 7 | 13 | 17 | R | 43.3 | no |
| ADA 1990 | House | July 12, 1990 | 232 | 5 | 145 | 23 | R | 86.3 | yes |
| ADA 1990 | Senate | July 13, 1990 | 54 | 0 | 37 | 6 | R | 86 | no |
| Welfare reform 1996 | House | July 31, 1996 | 98 | 99 | 230 | 2 | D | 49.7 | yes |
| Welfare reform 1996 | Senate | August 1, 1996 | 25 | 21 | 53 | 0 | D | 54.3 | no |
| ACA 2010 | House | March 21, 2010 | 219 | 34 | 0 | 178 | R | 0 | yes |
| ACA 2010 | Senate | December 24, 2009 | 60 | 0 | 0 | 39 | R | 0 | no |
| Dodd-Frank 2010 | House | June 30, 2010 | 234 | 19 | 3 | 173 | R | 1.7 | yes |
| Dodd-Frank 2010 | Senate | July 15, 2010 | 57 | 1 | 3 | 38 | R | 7.3 | no |
| Tax Cuts and Jobs 2017 | House | December 20, 2017 | 0 | 189 | 224 | 12 | D | 0 | yes |
| Tax Cuts and Jobs 2017 | Senate | December 20, 2017 | 0 | 48 | 51 | 0 | D | 0 | no |
| CARES 2020 | Senate | March 25, 2020 | 47 | 0 | 49 | 0 | R | 100 | no |
| Infrastructure 2021 | House | November 5, 2021 | 215 | 6 | 13 | 200 | R | 6.1 | yes |
| Infrastructure 2021 | Senate | August 10, 2021 | 50 | 0 | 19 | 30 | R | 38.8 | no |
| CHIPS and Science 2022 | House | July 28, 2022 | 219 | 0 | 24 | 187 | R | 11.4 | yes |
| CHIPS and Science 2022 | Senate | July 27, 2022 | 47 | 1 | 17 | 32 | R | 34.7 | no |
| Inflation Reduction 2022 | House | August 12, 2022 | 220 | 0 | 0 | 207 | R | 0 | yes |
| Inflation Reduction 2022 | Senate | August 7, 2022 | 50 | 0 | 0 | 50 | R | 0 | no |
| P.L. 119-21 (2025) | House | July 3, 2025 | 0 | 212 | 218 | 2 | D | 0 | yes |
| P.L. 119-21 (2025) | Senate | July 1, 2025 | 0 | 47 | 50 | 3 | D | 0 | no |
