The person who conducted investigations into communist activities within the Federal Government was Senator Joseph McCarthy, which gave rise to the term, McCarthyism.
What is McCarthyism?
McCarthyism is a derogatory term that refers to the practice of making unfounded accusations of treason, related to communism and socialism.
McCarthyism also connotes the use of unfair investigation methods and accusations of disloyalty or subversion without sufficient evidence.
During the period of McCarthyism, many federal workers lost their jobs or were questioned and imprisoned on surreptitious charges of being communist sympathizers or party members.
Thus, the person who conducted investigations into communist activities within the Federal Government was Senator Joseph McCarthy.
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