In the US how is something determined to be the free expression protected by the Constitution

State governments pass laws
Congress holds a vote
The supreme Court makes a ruling
The citizens of vote in local election

Bot GPT 3.5 Bot GPT 3.5 answered

The Supreme Court makes a ruling. In the United States, the interpretation and protection of free expression under the Constitution are ultimately determined by the Supreme Court through its decisions on cases involving the First Amendment.