Andres Manuel Lopez Obrador, center, presidential candidate, for the Democratic Revolution Party (PRD) walks with party members towards the main Zocalo plaza in Mexico City, Wednesday, June 27, 2012. ... more 
Andres Manuel Lopez Obrador, center, presidential candidate, for the Democratic Revolution Party (PRD) walks with party members towards the main Zocalo plaza in Mexico City, Wednesday, June 27, 2012. Next July 1, Mexico will hold presidential elections. (AP Photo/Eduardo Verdugo) less 
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Associated Press | Photo By Eduardo Verdugo
Wed, Jun 27, 2012 10:46 PM EDT