He was appointed by President Warren G. Harding to serve as Assistant Secretary of War from March 14, 1921, to March 4, 1923, when he resigned.
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Wainwright was elected as a Republican to the 68th, 69th, 70th and 71st United States Congresses, holding office from March 4, 1923, to March 3, 1931.
J. Mayhew Wainwright (1864–1945), United States Congressman and Army officer in the Spanish-American War and World War I
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