The Red Scare
1919-1920
The Red Scare was a time of anticommunist hysteria. The anti- communist was by Mitchell Palmer. The apprehension was a Bolshevik revolution would break out in the U.S. and cause communism. The newspapers and the radio encouraged the Red Scare.
http://www.goodreads.com/quotes/tag/mccarthyism
http://www.ushistory.org/us/47a.asp
http://www.ushistory.org/us/47a.asp