He’s the one who supported 0 too
The way I see it: If he supported Obama, he isn’t doing so now. It’s one thing to give someone a chance. It’s another thing to stick by that person when he utterly fails. So if Mr. Trump DID support Obama it could have been a case of “let’s see what he can do,” but now that the gamble has failed Mr. Trump sees things differently.
I’ve been there. I understand. Never supported Obama, but it’s happened in other cases.