Mexico is in the middle of a regime change, with a new regime to take over Dec 1. Old regime has been protecting these criminal invaders, and actually providing air conditioned buses, food and lodging to get them to the US border. Trump has now played his card: Trump Closed The Borders both ways. That means Mexican/US commerce comes to a screeching halt.    What does the current president care?  He is out of office in less than a week.  Dump this problem in the lap of the new president of Mexico.  Typical.