He's a fat fool with a bored wife who wants a more attractive chap in for a party each week which is what has happened - no fool like an old fool. Not much of a politician, never was, talks a good game but never delivers, leads by running to the front of a crowd, and has ruined his party.
Yes he will leave. But not before he's utterly ruined his own party, which they deserve, because they threw out every standard they had for him. They are still doing it, which is quite delicious.