“what the hell happened to this guy?”
It’s my understanding he interviewed with the Prez for AG and/or the Supremes and was turned down.
That’s exactly correct. He’s now got a grudge against Trump for passing him over.
I don’t think that is it, though it seems a popular theory around here.
My opinion is it stems from his reeducation camp seminar that FOX sent him to, after he defended Trump on a previous fake news scandal shortly after election. Unfortunately I can’t remember the topic of the incident. But, it was after Napolitano’s return from hiatus when there was a noticeable change in his support for Trump.