The correct answer is Senator Joseph McCarthy, from Wisconsin.
Senator Joseph McCarthy, from Wisconsin, led a crusade against Communism in the 1950s.
Republican Senator Joseph McCarthy (1908-1957) was the Chair of the Committee of investigations on the Senate and was known for its persecution of Communist, accusing the presence of Communist infiltrated in the United States government and the Armed Forces. This persecution was known as the Red Scare during the 1950s, The problem with the accusations of McCarthy was that he never showed solid evidence about the accusations, and damaged the reputation of many people. In the end, and having no solid evidence at all, the Senator lost popularity and his political career ended.