Electoral history of Robert A. Taft, United States Senator from Ohio (1939–1953), United States Senate Majority Leader (1953) and a candidate for the 1940, 1948 and 1952 Republican presidential nominations. Senator Taft was a longtime leader of the conservative wing of the Republican Party, as well as co-leader of the Conservative coalition, which dominated United States Congress for decades. United States Senate election in Ohio, 1938: Robert Taft (R) - 1,255,414 (53.62%) Robert J. Bulkley (D) (inc.) - 1,085,792 (46.38%) Wisconsin Republican presidential primary, 1940: Thomas E. Dewey - 70,168 (72.57%) Arthur H. Vandenberg - 26,182 (27.08%) Robert Taft - 341 (0.35%) Pennsylvania Republican presidential primary, 1940: Thomas E. Dewey - 52,661 (66.68%) Franklin D. Roosevelt (inc.) - 8,294 (10.50%) Arthur H. James - 8,172 (10.35%) Robert Taft - 5,213 (6.60%) Arthur H. Vandenberg - 2,384 (3.02%) Herbert Hoover - 1,082 (1.37%) Wendell Willkie - 707 (0.90%) Others - 463 (0.59%) Ohio Republican presidential primary, 1940: Robert Taft - 510,025 (99.52%) Thomas E. Dewey (write-in) - 2,059 (0.40%) John W. Bricker - 188 (0.04%) Arthur H. Vandenberg (write-in) - 83 (0.02%) Wendell Willkie - 53 (0.01%) Others - 53 (0.01%) Oregon Republican presidential primary, 1940: Charles L. McNary - 133,488 (95.89%) Thomas E. Dewey - 5,190 (3.73%) Robert Taft - 254 (0.18%) Wendell Willkie - 237 (0.17%) Arthur H. Vandenberg - 36 (0.03%) New Jersey Republican presidential primary, 1940: Thomas E. Dewey - 340,734 (93.85%) Wendell Willkie - 20,143 (5.55%) Franklin D. Roosevelt - 1,202 (0.33%) Robert Taft - 595 (0.16%) Arthur H. Vandenberg - 168 (0.05%) Scattering - 90 (0.03%) Arthur H. James - 81 (0.02%) Herbert Hoover - 69 (0.02%) All candidates, except Dewey, run as write-in 1940 Republican presidential primaries: Thomas E. Dewey - 1,605,754 (49.76%) Jerrold L. Seawell - 538,112 (16.68%) Robert Taft - 516,428 (16.00%) Unpledged - 186,157 (5.77%) Charles L. McNary - 133,488 (4.14%) R. N. Davis - 106,123 (3.29%) Arthur H. Vandenberg - 100,651 (3.12%) Wendell Willkie - 21,140 (0.66%) Franklin D. Roosevelt (inc.) - 9,496 (0.29%) Arthur H. James - 8,172 (0.25%) Herbert Hoover - 1,082 (0.03%) John W. Bricker - 188 (0.01%) Charles Montgomery - 5 (0.00%) Joseph William Martin, Jr. - 1 (0.00%) 1940 Republican National Convention (presidential tally): First ballot: Thomas E. Dewey - 360 Robert Taft - 189 Wendell Willkie - 105 Arthur H. Vandenberg - 76 Arthur H. James - 74 Joseph William Martin - 44 Scattering