Former Mexican president mocks Trump's 'stupid,' 'completely useless' border wall

Donald Trump has repeatedly promised voters he would keep unlawful immigrants out of the U.S. as president by building a massive wall along the Southern border and forcing Mexico to pick up the tab. But former Mexican President Felipe Calderon claims not only would his country never pay for such a thing, it would be a “completely useless” mechanism in preventing illegal immigration.

“We are not going to pay any single cent for such a stupid wall,” Calderon told CNBC during a recent interview. “And it’s going to be completely useless.”