Answer:
Accused government officials of being communist sympathizers or spies.
Conducted highly publicized investigations of supposed communist infiltration in the US government, the media, and Hollywood.
Engaged in red-baiting and McCarthyism, a political strategy of making baseless and exaggerated allegations of treason or subversion.
Held public hearings in the Senate Subcommittee on Investigations, where he questioned witnesses and accused them of being communists.
Destroyed the careers and reputations of many people through false accusations and public shaming.
Used the fear of communism to gain political power and influence.
Worked with the Federal Bureau of Investigation (FBI) and other intelligence agencies to gather information on suspected communists.
Authored the McCarran Internal Security Act, which required communist organizations to register with the government.
Conducted secret hearings and collected evidence through illegal surveillance and intercepting private communications.
Became the face of anti-communist extremism in America and fueled the Red Scare, a period of intense anti-communist fear and suspicion in the United States.