Actually, you can threaten the president. Several celebrities posted images of Trump beheaded and were not arrested, and were indeed met with wide acclaim.
Doesn't seem enforced unless there's actual steps taken. I'm just saying what I've seen. I've heard many baseless threats made against various presidents and no one cares.
Rights aren’t simply the absence of enforcement. The fact that threats against the president aren’t prosecuted doesn’t make those threats protected 1A speech.
https://en.m.wikipedia.org/wiki/Threatening_the_president_of...