Plain English
Government generally may not suppress speech because it dislikes the message or viewpoint.
That does not create an unlimited right to speak anywhere, at any volume, in any manner. Courts consider the forum, the government's reason for regulating, and whether a rule targets content or viewpoint.
Viewpoint discrimination is especially suspect.Government generally cannot favor one side of a debate merely because officials prefer it.
Forum matters.Streets and parks are treated differently from many offices, jails, schools, and courthouse spaces.
Content-neutral rules can sometimes be lawful.Proper time, place, and manner restrictions may survive constitutional review.