List of names of communist spies in the government--Jospeh McCarthy claimed he had a list of people's names who were spies for the USSR and were working in the government.
Joseph McCarthy, a Senator from Wisconsin, claimed to have the names of spies in the government. He then led an investigating committee where hearsay and rumors were the evidence against people named as being spies. It was later found in the investigation of Joseph McCarthy that he never had a list of names and he was bullying and threatening people to admit to untrue information.
The Red Scare was hysteria over the perceived threat posed by Communists in the U.S. during the Cold War between the Soviet Union and the United States, which intensified in the late 1940s and early 1950s.