Kersten was elected to the Eighty-second and Eighty-third Congresses (January 3, 1951 – January 3, 1955) once again representing Wisconsin's 5th district.
He served as chairman of the United States House Select Committee to Investigate Communist Aggression and the Forced Incorporation of the Baltic States into the U.S.S.R. during the Eighty-third Congress.
He was an unsuccessful candidate for reelection in 1954, and failed in his bid for renomination in 1956, as of 2018 making him the last Republican to represent Milwaukee in the U.S. Congress. In between these campaigns Kersten briefly served in the Eisenhower administration under Nelson Rockefeller as White House consultant on psychological warfare (1955–1956).
He then resumed his law practice, remaining active in anticommunist circles until his death on October 31, 1972, in Milwaukee, Wisconsin.
He was interred in Holy Cross Cemetery.
Sources
^'Wisconsin Blue Book 1954,' Biographical Sketch of Charles J. Kersten, pg. 17