Who knows right now? And New Hampshire doesn't decide the nominations, but a smashing win in New Hampshire certainly makes a good start to winning the nomination. It surely gains you lots of media attention. I haven't seen any polls on a Trump-Sanders matchup. The few I have seen of a Trump Hillary matchup were not good, the polls had Hillary beating the Donald by a slim margin. Not that polls mean all that much this early.
This ought to be a Republican year. Obama has been wreaking the US economy for 7 years now, and he has thrown a bunch a people out of work, lowered everyone's earnings. If the US voters have any sense left, they will vote for a Republican this time. If the Republicans can nominate a decent candidate. Trouble with Trump is his very high negatives. Gallup says 60% of voters don't like Trump. That's scary.
Will the Bern's free stuff be enough to win over The Donald?
Could the #2 finisher, Kasich, be a better candidate for the GOP?