The Univision polls of Hispanics show they aren't much more anti-Trump than they were anti-Romney last time around.
Anyway, I think there are two broad cases that would occur in this scenario. First is that Trump really does as poorly as the left thinks, women turn out en masse for Hillary, Hispanics turn out in record numbers, etc., and we get something like this:
I think this is pretty much Hillary's ceiling.
However, simply by the fact that Trump has won the nomination in this case, this demonstrates that Trump does indeed have the ability to bring in disaffected non-voters onto his campaign. Combined with the fact that international candidates of Trump's profile often under-poll, I'd give the following a much greater chance of happening than most on this forum:
I think this is Trump's realistic ceiling.
