Well, to be honest, it depends on how much of a circus the Republican primary will be this year. The thing that killed Mitt Romney politically was all the Bullshit he said to appeal to their religious racist base, but that didn't go over so well because even the undecided idiots knew better and he had a tough time getting their vote. Then he also had trouble with his political base when he became known as the etch a sketch candidate.
The trouble with the Republican Primaries is they would make the most serious candidate like Scott Walker look like a clown. If that happens, then you will likely see Hillary win. If they have a good primary, regretfully, I can see Scott Walker win.