The 1942 United States Senate election in Iowa took place on November 3, 1942. Incumbent Democratic Senator Clyde Herring ran for re-election to a second term but was defeated by Republican Governor George A. Wilson.
After losing the primary, Seemann entered the general election on the "Progressive New Dealer" ticket.
Republican primary[]
Candidates[]
G. Scott Davies
James I. Dolliver, member of the Fort Dodge Board of Education, former County Attorney for Webster County, and nephew of former Senator Jonathan P. Dolliver
Mark G. Thornburg, Iowa Secretary of Agriculture since 1939