FILE - In this Aug. 12, 2013 file photo, Mexico&amp;#39;s President Enrique Pena Nieto shows to the audience his proposal that would allow private firms to participate in the oil industry in Mexico City. The opening of Mexico&amp;#39;s oil industry to private and foreign investment caps a remarkable series of legislative victories by President Pena Nieto, who is trying to re-engineer the country’s most dysfunctional institutions. (AP Photo/Eduardo Verdugo, File)