Freedom of Speech for Dummies
Sometimes it helps to review the basics, and it doesn’t get any more basic than this. Here is the wording of the First Amendment to the Constitution.
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
To edit this so we address only freedom of speech, try this: