President Obama and Mexican President Enrique Pena Nieto shake hands following their news conference at the Palacio Nacional in Mexico City on May 2, 2013. (Associated Press) **FILE**

Photo by: Pablo Martinez Monsivais

President Obama and Mexican President Enrique Pena Nieto shake hands following their news conference at the Palacio Nacional in Mexico City on May 2, 2013. (Associated Press) **FILE**