Constitutional law permits each state to create and enforce additional laws for their state. Each state is considered sovereign and has the power to create laws as needed. Each state is considered unique with its own characteristics.
What was the case that led to the First Amendment?
Free Speech: Schenck v. United States, 1919: In this case, the Supreme Court upheld the conviction of Socialist Party activist Charles Schenck after he distributed fliers urging young men to dodge the draft during World War I.