I'm sorry, but this issue is cut-and-dried. I know that Trump is holding the line, but he is up against some powerful forces and I'm worried that pieces of his armor is starting to crack.
All Trump has to do is point out Mexico's immigration laws. Mexico has some of the strictest immigration laws in the world. You cannot vote as a foreigner in Mexico. You cannot buy property. Get government jobs or benefits. If you break the law, you are out of the country with no due process.