First off, something between 40% and 50% on the so-called 'illegal' immigrants are visa overstays. But I wonder what most of the Trump supporters, if asked, would say where they think most of these visa overstays came from. I suspect that they would be shocked to learn that the vast majority of these visa overstays are from Europe. And the second largest group: Canadians. As for Mexico, it's way down on the list.
Anyway, I can't help but think that all those Trump supporters who keep shouting "BUILD THE WALL" would have second thoughts if they knew that many of the people Trump is proposing to deport are people who look just like they do with a big chunk of them even speaking English as their first language.

OCU