Donald Trump, I think is he answer to this little mystery as well.

He appealed to bigoted misogynistic racist assh*les.

Mexicans were not immune to his nonsense and a lot of them just happen to be the sort of people who would definitely be Trumpers if they weren't Mexican....maybe enough to skew the numbers

I'm going to guess that once he's gone the Hispanic vote will return to its former balance.

Good coffee, good weed, and time on my hands...