Carlson was a resident of St. Paul and sitting state Representative (HD 41, 1947-1953).
McDonough was a resident of St. Paul.
Shoemaker was a resident of North Redwood, former newspaper editor and publisher, U.S. Representative (At-large, 1933-1935). Shoemaker was also a Farmer-Labor nominee for the 3rd CD in 1930, a Farmer-Labor candidate for U.S. Senate in 1934, a Farmer-Labor nominee in the 7th CD in 1942, an independent candidate for the 8th CD in 1934, a Farmer-Labor candidate for the 8th CD in 1936, a Farmer-Labor candidate for the 7th CD in 1938 and 1940, a Republican candidate for the 7th CD in 1946, and a DFL candidate for the 7th CD in 1950.