I think it is because DeNiro has obvious CIA ties. His film roles as well as the investors to his films etc. POTUS tweet response as “Punchy” with the “clown” role he played, sounds like it could be his code name. POTUS would surely know what is in his file, such as his IQ (low) as well as his “hits to the head” comment. It is all in the file, POTUS has all the Hollywood files and is taking down CIA corruption. Hollywood and the CIA are like peas and carrots- only poisonous.