Which member of president wilson's administration used Americas fear of communism to illegally arrest 5000 suspected communists and anarchists

The member of Presint Wilson's administration that arrested and deported hundreds of suspected communists and anarchists was A. Mitchell Palmer. He was US Attorney General from 1919 to 1921 and was responsible for carrying out the "Palmer Raids" against leftist activists, specially inmigrants who were though to be communists and anarchists.

His policies of repressing alien ideologies occured during the First Red Scare, which was a period of social unrest caused by the activism and terrorist acts of anarachists and communist in 1919-1920.