Special primary election to fill the vacancy caused by the death of Republican U.S. Senate Knute Nelson on April 28, 1923.
Johnson was a resident of Kimball, a former state Representative (HD 26, 1915-1919), and sitting state Senator (SD 26, 1919-1923). Johnson was the Farmer-Laborite guberntorial nominee in 1926, won election to an at-large U.S. House seat (1933-1935), and sought the Farmer-Labor gubernatorial nomination in 1936.
Fritsche was a physician and Mayor of New Ulm.
Lindbergh was a resident of Little Falls, a former prosecuting attorney of Morrison County (1891-1893), former Republican U.S. Representative (CD 06, 1907-1917), Republican candidate for U.S. Senate in 1916, and Republican candidate for Governor in 1918.