If Jeb is nominated, the republican party will realize they have a lot fewer voters than they thought the could count on. There is absolutely zero chance that I would vote for Jeb Bush.
I wouldn’t vote for a Bush or a Clinton in any situation.
NBC was trying to push Hillary, afraid Sanders is going to catch up with her. I imagine he already has.
As for the pubbies, I can only guess they want to lose with Jeb.