Atomic Playboy
Member
In the Republican primary it won't hurt but having a popular ex-governor of Florida endorse HRC would definitely help paint Trump as an extremist in the general election. If even a small % of independent voters are persuaded by that it would lock down Florida, and the election as a whole, for Clinton.
Is Jeb! that popular in Florida? He's currently polling fifth in state polls (which pretty much mirrors his performance nationally); he is WAY behind Trump. I can't imagine his endorsement is going to swing people on the fence to HRC over The Donald.