Quinnipiac is drunk this cycle. Way off in favor of Sanders in the primary and way off in favor of Trump now.
The poll is 76% white (not happening, the electorate will be 72% white at most)
Trump is getting a third of Latinos (he's going to get a fifth at most)
Something is a little suspicious if Trump is winning whites by only 13 but Clinton is ahead overall by 2.
There's an unusual amount of other/undecided percentage this election so being ahead by 13 in the polling may mean he may win by 16 or 17 or possibly more in the end. Same goes with all categories (except Blacks, who are nearly unanimous for Clinton)