These cases all make reference to the First Amendment of the United States Constitution, which states that "Congress shall make no law respecting an establishment of religion, or prohibiting the exercise of it. As well as abridging the freedom of speech, or of the press.
In the case of "Brandenburg vs Ohio", The Supreme Court reversed the conviction under the argument that the government cannot punish "abstract advocacy of force or law violation". It maintained a similar position of overturning State Court convictions under this premise regarding the cases of Charles Schenck and Gregory Lee.
