I'm getting the impression that Jeb! doesn't want to be president.
BUSH: "If this election is about how we're going to fight to get nothing done, then I don't want anything, I don't want any part of it. I don't want to be elected president to sit around and see gridlock just become so dominant that people literally are in decline in their lives. That is not my motivation. I've got a lot of really cool things I could do other than sit around, being miserable, listening to people demonize me and me feeling compelled to demonize them. That is a joke. Elect Trump if you want that."
Jeb! may not want to preside over a fresh session of congressional gridlock, nor would anyone else want to, but this doesn't seem like something someone who actually wants to be president would say.
The good news for Jeb is the Republican party appears to be well on its way toward nominating Trump. Jeb doesn't need to worry about the great burden of the presidency because primary voters are way ahead of him.