Really, it's none of my business, but the politics in the US have global influence. And I'm not really criticizing or judging them, at least not for Americans, they can do their own research, they've abundant resources, shit, if they're online and reading this they've got the internet and there's no excuse...
But as an observer, Canadian, with the same interest every other country on earth has in their elections and politics, this is what I think is gonna happen:
#1) Donald Trump will win the Republican Nomination, and be their candidate.
#2) Either Hillary or Bernie Sanders will win the Democrat Nomination. I'm hoping (?) guessing Bernie Sanders. He appears to have some intelligence, wit and reason behind him.
#3) Appalled and Dismayed by the possibility or even thought of Donald Trump becoming President (!!!), most reasonable, intelligent and educated Republicans will vote Democrat. A very slight shift, but enough to turn the election.
PREDICTION: BERNIE SANDERS WILL BE THE NEXT PRESIDENT OF THE USA.
That said, it will be interesting regardless. So strap on your seatbelts and prepare for the ride...