In USA we have Freedom of Speech, most of the time for most of the things.
USA is not above doing covert operations on its own citizens see: COINTELPRO.
USA is not above temporarily repealing freedom of speech in times of crisis see:
- https://history.house.gov/Historical-Highlights/1700s/The-Sedition-Act-of-1798/
- https://en.wikipedia.org/wiki/Sedition_Act_of_1918