Frederick J. Petersen (whose name may be found spelled Frederic or Frederich, and occasionally Peterson even in official documents) (February 24, 1874 – October 14, 1946) was an American physiotherapist who served three terms as a Republican member of the Wisconsin State Assembly from Milwaukee, Wisconsin.
Petersen's official biography of 1921 describes him as taking "a keen interest in municipal, state and national politics", but states falsely that he had "never sought or held a public office until elected to the assembly in 1920".
[2] In 1922, Sievers again faced Cooney, this time widening the margin of victory to 76 votes (1489 to 1413).
[3] In 1924, Petersen challenged Socialist Joseph Padway for the Sixth State Senate District, losing 7248 to 5384.
This time Kaiser (with Franklin D. Roosevelt at the top of the Democratic ticket) was the victor, with 2240 votes to Cords' 1412, Rubin's 2130, and another 129 for the two independents.