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Filter by:
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|---|---|
| Senator | Term |
| John P. Hale (ID, FS, OP, R-NH) | ended 1862 |
| Henry B. Anthony (R-RI) | 1862–1884 |
| John Sherman (R-OH) | 1884–1885 |
| George F. Edmunds (R-VT) | 1885–1891 |
| John Sherman (R-OH) | 1891–1897 |
| William Boyd Allison (R-IA) | 1897–1908 |
| Eugene Hale (R-ME) | 1908–1911 |
| Shelby M. Cullom (R-IL) | 1911–1913 |
| Jacob H. Gallinger (R-NH) | 1913–1918 |
| Henry C. Lodge (R-MA) | 1918–1924 |
| Charles Curtis (R-KS) | 1924–1929 |
| James E. Watson (R-IN) | 1929–1933 |
| Charles L. McNary (R-OR) | 1933–1944 |
| Arthur H. Vandenberg (R-MI) | 1945–1947 1 |
| Eugene D. Millikin (R-CO) | 1947–1957 |
| Leverett Saltonstall (R-MA) | 1957–1967 |
| Margaret Chase Smith (R-ME) | 1967–1973 |
| Norris H. Cotton (R-NH) | 1973–1975 |
| Carl T. Curtis (R-NE) | 1975–1979 |
| Robert W. Packwood (R-OR) | 1979–1980 |
| James A. McClure (R-ID) | 1981–1985 |
| John H. Chafee (R-RI) | 1985–1991 |
| Thad Cochran (R-MS) | 1991–1997 |
| Connie Mack III (R-FL) | 1997–2001 |
| Rick Santorum (R-PA) | 2001–2007 |
| Jon L. Kyl (R-AZ) | 2007 |
| Lamar Alexander (R-TN) | 2008–2012 |
| John Thune (R-SD) | 2012–2019 |
| John Barrasso (R-WY) | 2019–present |
