There are different kinds of tactics. The tactic used in the early 1950's is described in this question is McCarthyism.
McCarthyism is the known to be a practice of making some kind of accusations of subversion and treason, mostly to those who are related to communism and socialism.
The Warren Court is said to have made a lot of rulings on civil and political rights that overturned a lot of McCarthyist laws and directives, and helped end the reign of McCarthyism.
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