This is a stupid idea. EVERY MAJOR AIRPORT IS A LEGAL POINT OF ENTRY. Any airport that has international flights. Every train-stop on a line that crosses the borders Every seaport and river port... it’s just dumb. Our map “borders” are meaningless in this regard, when I can get on a plane in Buenos Aries and land in Atlanta, Dayton, Houston, Chicago, New York, Newark... and so on. It’s just dumb. We are way more interconnected that this proposal seems to acknowledge. Not to mention most of the undocumented immigrants overstayed their legal visas. The poor people at the southern boarder are only a tiny fraction of international travel that flows in and out of this country every single day at hundreds and thousands of airports, train stations, seaports, and river ports all around the country.