Hey, the First Amendment covers chants too.
You mean, if I go into your house and start chanting, you can’t do anything? First Amendment.
There was a debate of candidates at the NBC studio, and NBC made the rules for the audience, and if they wanted to silence a chant, or evict someone for heckling, the First Amendment has no relevance to what occurs there. In the public square, you have First Amendment protection, not in NBC’s studio, nor on your private property. There you’re just trespassing, if you violate the conditions given for access.