Who led the effort to expose alleged communists within the U.S government? A. President Truman B. President Kennedy C. Senator McCarthy D. General MacArthur

C. Senator McCarthy<br /><br />Senator Joseph McCarthy led the effort to expose alleged communists within the U.S. government during the Second Red Scare, a period of intense anti-communist paranoia in the United States from the late 1940s to the late 1950s. His accusations, often lacking evidence, became known as McCarthyism.<br />