In addition to the frequently discussed Rust Belt states, I've heard some chatter about a couple of smaller New England states where he might have an opportunity. Connecticut and Rhode Island keep coming up as long shots, but possibilities.
If Trump wins New York, we're talking Reagan-like landslides.
IF Trump is leading by double-digits in the late fall, he’ll win PA, OH and FL and maybe OR and WA.
NY is a stretch but I suppose anything is possible.
At the moment, it looks like a close race with Hillary having the upper hand.
New York would depend on turn out
Plus Trump has home field advantage of Hillary, Hillary is a transplant after all
And Upstate, the rust belt of NY, LOVES Trump
If the NYC Turnout is lower than expected because Hillary is umm, blah to them. And Upstate is energized to vote Trump, Trump wins NY and the election, period, end of story