It's well known that older voters tend to be conservative. It's also known that hispanic immigration to the US really took off in the 1960's, meaning the first big waves of children born to hispanic immigrants are entering their 60's.
Has anyone considered if the recent upswing in latino support for Republicans is just because they're aging, rather than R's doing better courting them? Perhaps one way to answer the question would be a study that looked at latino support for Republicans over time, broken up by age. If most of the increase in support is older latinos, it would seem the swing has more to do with age than better pandering.