They have Latinos at only 9% of the electorate, too. I know, subsample MoE, but that's your problem right there. Trump is only winning white voters by 12 points in this poll, and if that happens, Clinton wins handily.
My larger point is that given a variety of data, we know that Latino voters will go for Clinton by a much larger margin than 15 points.
Now it's possible that Clinton does worse with white voters than -12, but if she gets even close to that, she will win because we know approximately what the electorate will look like (and if anything, the early vote indicates that Latino enthusiasm is high this year). Also, the MoE on the white subsample is a lot lower than the Latino subsample.
