Jeb Bush might get a slight Favorite Son effect in Florida, but probably not enough to win the state. He'd probably need the help of a re-elected Rick Scott, which isn't likely to materialize.
All scenarios showing any Republican close to defeating Hillary Clinton have involved Chris Christie before his alleged abuse of power. As it is I can't see Jeb Bush defeating Hillary Clinton where Obama won in 2012 except perhaps Florida. Jeb Bush, having not been elected in Florida even as a VP nominee, has been away too long from Florida politics to have more of an advantage than Gore in Tennessee in 2000.
I have North Carolina iffy -- and Arizona, Georgia, Indiana, and Missouri undetermined out of a lack of polling.
Jeb Bush would have been a better President than Dubya.