The GOP hasn't found a way to stop either of those Clintons yet. And given the piss poor candidates that it has to select from for 2016, it won't then either.
Obama, Bill, and Hilary are undefeated against the Republicans. I just realized that when you wrote that. Wow.
I do believe that a Jeb/Rand Paul ticket could defeat Hilary... Jeb brings that experienced, serious gravitas that people trust. Nobody is going to look at a squirly, giggling 42 year old Marco Rubio and say "Wow, this guy really is ready to lead the free world..."
Jeb has the serious, conservative traditional voters in his pockets, he has FL, and he has the hispanic voters too. Add in Rand, and you have the tea party ecstatic and a few Ron Paul lovers tagging along for another chance to wear the cool "LOVE" t-shirts.
Together, they'd be a tough combination to beat. However, I do think the GOP will splinter like they did in 2012... remember Cain, Newt, Perry all eating one another with cries of "You're more lib than I am!" and after the election, they all go their separate ways. hate obama all you want - but he put Biden, Hilary, and Kerry - the main power players of the party - right into his pocket to ensure party unity.
Does the GOP have party unity?