Andres Manuel Lopez Obrador, center, presidential candidate for the Democratic Revolution Party (PRD) waves to supporters as he walks towards the main Zocalo plaza during a massive march for the final... more 
Andres Manuel Lopez Obrador, center, presidential candidate for the Democratic Revolution Party (PRD) waves to supporters as he walks towards the main Zocalo plaza during a massive march for the final campaign closing rally in Mexico City, Mexico, Wednesday, June 27, 2012. Next July 1, Mexico will hold presidential elections. (AP Photo/Dario Lopez-Mills) less 
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Associated Press | Photo By Dario Lopez-Mills
Wed, Jun 27, 2012 10:46 PM EDT