Be serious. We are apprehending over half a million people annually trying to cross the border and many more are getting through. Just a few years ago, apprehensions were over a million annually. We are being invaded.
True, we could slow down the process but at what cost? My solution for years has been to invade Mexico and throw out the government. Then, give them a copy of our Constitution and say “use this document like we did at our founding, not today.” It would take about a week a cost a lot less.