WARNING
Whites
Biden 46 Trump 48
Hispanics
Biden 45 Trump 48
It's the 2nd consecutive month that Quinnipiac has found Trump winning Hispanics by more than Whites, I genuinly think they've changed their methodology recently.
What's the sample size? Subsamples like this usually have crazy margins of error and aren't worth paying attention to.
The total number polled is 1,421. Hispanics are about 18.7% of the US population (although lower for percentage of registered voters), so even if they were sampled at that rate (which as noted would be an oversampling), that's a pretty small sample of 266.