If a politician's hobby is shouting fire in crowded, dark theaters and a theater chain bans the said politician from their property - whose fault is it?
I am not saying this is the answer, but I want to throw out an option that I am not sure is being considered: "the people who voted for them"?
Winning a vote does not exempt one from other responsibilities, such as obeying the law. There are places that do that, but it just means you're electing a king. Our system was/is explicitly designed to prevent this occurrence.