In this Aug. 31, 2016 photo, Mexico's President Enrique Pena Nieto, left, and Republican presidential nominee Donald Trump shake hands after a joint statement at the presidential official residence in Mexico City.
In this Aug. 31, 2016 photo, Mexico's President Enrique Pena Nieto, left, and Republican presidential nominee Donald Trump shake hands after a joint statement at the presidential official residence in Mexico City. Marco Ugarte AP
In this Aug. 31, 2016 photo, Mexico's President Enrique Pena Nieto, left, and Republican presidential nominee Donald Trump shake hands after a joint statement at the presidential official residence in Mexico City. Marco Ugarte AP