Time to close the border and set up the machine guns. Add copious armed drones to patrol the border between the cities and crossing points. Occupy a strip of land one mile deep in Mexico to use for pushing ALL the border assaulters back into that part of Mexico. Start arresting and fining and trying random employers of illegals from rich folks who hire them as gardeners to industrial companies that hire them on the assembly line. Do some urban roundups at day labor waiting points. We don’t have to do a lot of that, just do it very publicly and truck a few thousand from various parts of the country to the border and kick them across while sending a few thousand more in one or two old freighters into Vera Cruz harbor. If Mexico won’t let them land, disable the ships and leave them there, or better, tow them down there with their engines removed. There will begin then voluntary mass migration out of the country. That all should include illegals of every sort, Mexicans and others including visa overstayers. Carry them all back to Old Mexico.
If only.....