This country is wall to wall with elections that are won or lost by a handful of votes. Don't think for a minute that a shift in Hispanic votes is not significant regardless of whether it is small or large.
Same with Black shift which is also definitely occurring. The thing standing in the way of Republicans is Dem cheating.
To that point, Oregon is on the verge of electing its first Republican governor in many decades because, well, the dems have improved the state to the point that it is increasingly unlivable, particularly Portland. And ALL of Oregon's voting is by mail. Yup the vans driving around picking up the ballots to mail them will be a-buzzing. "I will be by on Thursday to pick up your ballot and take it to the post office for you. If you are busy just sign the ballot and I will fill out the rest for you." Some ballots will be lost in transit too. They will all be republican.