When President Roosevelt issued an executive order on March 16, 1943, creating Jackson Hole National Monument, Hunt joined in mobilizing opposition and said he would use state police to remove any federal official who tried to exert authority in the Monument's lands. Congress refused to fund the Monument until 1950, when Wyoming's two U.S. Senators, Joseph C. O'Mahoney and Hunt, reached a compromise with the Truman administration. It merged most of the Monument's lands into Grand Teton National Park, provided compensation for lost revenue, and protected local property owners.