Presidential candidate Andres Manuel Lopez Obrador of the Democratic Revolution Party (PRD) casts his vote at a polling station in Mexico City, Sunday, July 1, 2012. Candidate Enrique Pena Nieto of ... more 
Presidential candidate Andres Manuel Lopez Obrador of the Democratic Revolution Party (PRD) casts his vote at a polling station in Mexico City, Sunday, July 1, 2012. Candidate Enrique Pena Nieto of the Revolutionary Institutional Party (PRI), is leading with about 40 percent of vote while Lopez Obrador has about 31 percent, according to the first exit polls. (AP Photo/Eduardo Verdugo) less 
1 / 31
Associated Press | Photo By Eduardo Verdugo
Sun, Jul 1, 2012 9:38 PM EDT