His mental state is obviously deteriorating if he now believes he's clairvoyant. An intervention is clearly needed in order to keep him from embarrassing himself (not to mention incriminating himself) over and over again, but, as many people know, it's virtually impossible to save a person from himself. If Trump keeps going on like this, he'll end up being the poster boy for the importance of seeking help for mental health issues, and the dangers of not getting that help.
Trump has always been an attention whore, even when he was a private citizen. When he ascended to the presidency, he had the biggest megaphone in the world, and he could not resist being the center of attention as often as possible. He lost all of that almost two years ago, and I think he's having a very hard time dealing with his increasing irrelevancy on the national stage.
The question is this: What kind of crazy shit is he going to do in the weeks and months to come?