The Trump administration has pledged to be tough on illegal immigration, and Mexico isn’t happy with the “hostile” plan that could send people who entered the U.S. illegally through the southern border back where they came from:

From Reuters:

The U.S. Department of Homeland Security unveiled plans on Tuesday to consider almost all illegal immigrants subject to deportation, and will seek to send many of them to Mexico if they entered the United States from there, regardless of their nationality.
[…]
Mexico’s lead negotiator with the Trump administration, Foreign Minister Luis Videgaray, said there was no way Mexico would accept the new rules, which among other things seek to deport non-Mexicans to Mexico.

“I want to say clearly and emphatically that the government of Mexico and the Mexican people do not have to accept provisions that one government unilaterally wants to impose on the other,” he told reporters at the Foreign Ministry.

From the sound of it Mexico might build the wall before Trump does!