Senators 15 / 21
Mike Crapo (1951)
Mike Enzi (1944)
Mike Johanns (1950)
Mike Lee (1971)
Mike Mansfield (1903)
Montfort Stokes (1762)
Morton S. Wilkinson (1819)
Moses E. Clapp (1851)
Muriel Humphrey Brown (1912)
Nanci Parrilli (1953)
Nancy Patricia Gutiérrez (1963)
Nancy Riley (1958)
Nat G. Kiefer (1939)
Nathan A. Farwell (1812)
Nathan L. Bachman (1878)
Nathaniel B. Dial (1862)
Nathaniel P. Hill (1832)
Nathaniel P. Tallmadge (1795)
Nathaniel Silsbee (1773)
Nehemiah R. Knight (1780)
Nelson W. Aldrich (1841)
Nicholas F. Brady (1930)
Nicholas Gilman (1755)
Norm Coleman (1949)
Obadiah Gardner (1852)
Octaviano Ambrosio Larrazolo (1859)
Oliver Henry Shoup (1869)
Omar D. Conger (1818)
Orrin Hatch (1934)
Orville H. Platt (1827)
Ozora P. Stearns (1831)
Paine Wingate (1739)
Pat Harrison (1881)
Pat McCarran (1876)
Pat Roberts (1936)
Patrick V. McNamara (1894)
Patty Murray (1950)
Paul Coverdell (1939)
Paul Douglas (1892)