That lead isn't as large as the other polls have shown, but it was taken during the RNC, and if Hillary does win by that much, it'll probably be enough for her to win.
This is a poll of Latinos from battleground states. So it takes out favorable states like California, New York, New Jersey, Illinois (and slightly unfavorable in Texas) for Clinton. So it makes sense that it would be a bit narrower.
I would think New York would be less favorable. I don't know enough about Texas, but my guess there would be more favorable (unless "White Hispanic" is higher than I'm expecting). I don't see presidential year crosstabs for these very often though so there's some guesswork.
