In this combo of three pictures are Mexican presidential candidates Enrique Pena Nieto, of the Institutional Revolutionary Party (PRI), top, Andres Manuel Lopez Obrador, of the Democratic Revolution ... more 
In this combo of three pictures are Mexican presidential candidates Enrique Pena Nieto, of the Institutional Revolutionary Party (PRI), top, Andres Manuel Lopez Obrador, of the Democratic Revolution Party (PRD), center, and Josefina Vazquez Mota, of the National Action Party (PAN), campaigning in different locations in Mexico in June 2012. Mexico is holding its presidential election on Sunday, July 1. (AP Photo/Christian Palma, Eduardo Verdugo, Dario Lopez-Mills) less 
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Associated Press | Photo By Christian Palma, Eduardo Verdugo, Dario Lopez-Mills
Wed, Jun 27, 2012 7:06 PM EDT