They've been around for a long time and presumably have a lot of "Hollywood" connections. They have a ton of money and their own teams of lawyers on stand-by. They're some of the only people that could get into a feud with him and come out with more money.

I mean, if he attacks them too much they can just pack up and move. That's what they've been telling us billionaires will do if we tax them so it's safe to assume that's what will happen if he goes after them in any real way.