A court may enjoin enforcement of a statute that is so overbroad in its prohibition of unprotected speech that it substantially prohibits protected speech—especially if the statute is being enforced in bad faith. Decided April 26, 1965 (argued January 25, 1965). Opinion of the Court: William J. Brennan → go there Dissenting: Harlan. Applied: the First Amendment → go there Topic: Freedom of speech and of the press. Dombrowski v. Pfister, 380 U.S. 479 (1965), was a landmark United States Supreme Court case brought forth by Dr. James Dombrowski along with William Kunstler, founder of the Center for Constitutional Rights, against the governor of Louisiana, law enforcement officers, and the chairperson of the state's Legislative Joint Committee on Un-American Activities for prosecuting or threatening to prosecute his organization under several state subversion statutes. Wiki link