The answer to, “...who will you vote for if he (Trump) is the nominee?” is Trump. Stop being an asshat about not going out to vote because the candidate isn’t a blueprint conservative. Hillary or Bernie will further degrade our great country. Do you want that?
Your assumption is that a lifelong liberal NYer with a massive ego won’t be as bad for the country as either of the two upfront liberal. I would respectfully disagree with that assumption. Big imperial government is bad regardless of which party runs it.