1956 United States House of Representatives election in Wyoming

none February 2026 September 2023 1956 United States House of Representatives election in Wyoming Wyoming by-election no 1954 United States House of Representatives election in Wyoming 1954 1958 United States House of Representatives election in Wyoming 1958 November 6, 1956 Edwin Keith Thomson (Wyoming Congressman).jpg 150x150px Keith Thomson Republican Party (United States) 69,903 58.19% Jerry A. O'Callaghan Democratic Party (United States) 50,225 41.18% U.S. Representative Keith Thomson Republican Party (United States) Keith Thomson Republican Party (United States) The 1956 United States House of Representatives election in Wyoming was held on November 6, 1956. Incumbent Republican Congressman Keith Thomson ran for re-election to a second term. He won the Republican primary unopposed and faced Democratic nominee Jerry A. O'Callaghan, a history instructor at the University of Wyoming and former journalist, in the general election. Thomson defeated O'Callaghan with 58 percent of the vote, slightly underperforming President Dwight D. Eisenhower's landslide victory in the state. Democratic primary Candidates Jerry A. O'Callaghan, history instructor at the University of Wyoming, former oil editor of the Casper Tribune-HeraldO'Callaghan Is canddiate For Congress Casper Tribune-Herald July 13, 1956 Casper, Wyoming 1 https://www.newspapers.com/article/casper-morning-star/174811172/ June 18, 2025 A. M. Downey, former State Representative3 Democrats Ask Nomination For House Seat Casper Tribune-Herald July 10, 1956 Casper, Wyoming 15 https://www.newspapers.com/article/casper-morning-star/174811279/ June 18, 2025 Dora Belle Harris, rancherThomson FIles Again for House Casper Morning Star July 10, 1956 Casper, Wyoming 18 https://www.newspapers.com/article/casper-morning-star/174811362/ June 18, 2025 George W. K. Posvar, 1954 Democratic candidate for CongressPosvar Seeks Dem Nomination to House Casper Morning Star July 3, 1956 Casper, Wyoming 22 https://www.newspapers.com/article/casper-morning-star/174811421/ June 18, 2025 Results Democratic primary resultsCopenhaver Everett T. Robertson Ray E. 1957 Wyoming Official Directory and 1956 Election Returns Wyoming Secretary of State Cheyenne, Wyoming 1957 https://babel.hathitrust.org/cgi/pt?id=uiug.30112114896449&seq=3 Jerry A. O'Callaghan Democratic Party (United States) 12,315 43.37% A. M. Downey Democratic Party (United States) 8,581 30.22% Dora Belle Harris Democratic Party (United States) 5,413 19.06% George W. K. Posvar Democratic Party (United States) 2,086 7.35% 28,395 100.00% Republican primary Candidates Keith Thomson, incumbent U.S. Representative Results Republican primary results Keith Thomson (inc.) Republican Party (United States) 34,321 100.00% 34,321 100.00% General election Results 1956 Wyoming's at-large congressional district general election results Keith Thomson (inc.) Republican Party (United States) 69,903 58.19% Jerry A. O'Callaghan Democratic Party (United States) 50,225 41.81% 120,128 100.00% Republican Party (United States) Democratic Party (United States) References 1956 Wyoming Category:1956 Wyoming elections