“really think we Southerners will sit back and let Mexico take us over?”
We in Oklahoma saw it happening and put a stop to it.
At first, the thought was, oh lovely more laws, but honestly this is working. If they do not have vehicles to get to their low paying jobs they can't work, thus no money. Either they are going to the safe harbors the left wingers have setup for them or they are returning to Messico... spelled that way for a reason.
In other words, focus on electing the local officials and state officials. They are the ones getting the job done. In fact, this was how the Founding Fathers expected this to work in the first place.