The crackdown on socialists, Communists, and other radicals was called the Red Scare and peaked after radicals exploded eight bombs, including one at the house of the U.S. Attorney General, A. Mitchell Palmer.
Explanation:
Red scare was led by the Alexander Mitchell Palmer. He was Attorney General in the United States of America in the year 1919-1921.
Red Scare happened due to threat from the American labor movement, Bolshevik Revolution in Russia and political radicalism after World War I. Red scare spreads the fear of potential rise of communism in the state. Red scare emerged at peak after the explosion of bombs by radicals.
