Which Republican senator held a series of televised hearings to investigate allegations of communist spying in the United States?

Question

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Joseph McCarthy held the televised hearings known as the Army-McCarthy hearings in 1954 to investigate allegations of communist infiltration in the United States military. He was a Republican senator from Wisconsin and led a controversial campaign against supposed communist sympathizers in the government and Hollywood.

Which Republican Senator Held a Series of Televised Hearings to Investigate