Trump can't invoke executive privilege because he has no legal grounds to do so. If Trump is smart he'll hold off on his "tweeting" for awhile. What are the chances of that happening. He's already made himself look like even more of an idiot (if that is even possible) with his dumb tweets misrepresenting the remarks of the mayor of London. What an awful thing to do, with all they are going through. Trump is a low class jerk.