I wouldn’t call a Jeb Bush endorsement the kiss of death in this instance necessarily. Ever since “low-energy” Jeb was getting stuffed into his locker daily by Trump, I think he’s been burning with resentment and would see that Trump was defeated by any means necessary.
What a marvelous visual!
Well, Jeb is a Bush and as a Bush he was entitled to the nomination so of course he hates Trump. That and he’s got a garage full of Guacobowls that he can’t get rid of—makes him cranky everything he goes in there.