Which attorney general created a "red scare" in 1920 by arresting 5,000 suspected communists and anarchists who were held without trial and denied their basic civil rights?

Verified Answer :

attorney general Alexander Mitchell palmer.

Alexander Mitchell Palmer, was best known for overseeing the ''Palmer Raids'', and arrested 5,000 who were suspected communists and anarchists. I hope this was helpful! Have a good day!