MEXICO CITY, MEXICO - JUNE 30: Student protesters march the day before Mexicans go to the polls to choose a new president on June 30, 2012 in Mexico City, Mexico. Thousands of students from the movement known as YoSoy132 staged the march calling for a transparent democratic process. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 30: Student protesters march a day before Mexicans go to the polls to choose a new president on June 30, 2012 in Mexico City, Mexico. Thousands of students from the movement known as YoSoy132 staged the march calling for a transparent democratic process. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 30: Student protesters march a day before Mexicans go to the polls to choose a new president on June 30, 2012 in Mexico City, Mexico. Thousands of students from the movement known as YoSoy132 staged the march calling for a transparent democratic process. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration calling for electoral transparency in front of Mexico's Federal Election Commission on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 30: Student protesters march a day before Mexicans go to the polls to choose a new president on June 30, 2012 in Mexico City, Mexico. Thousands of students from the movement known as YoSoy132 staged the march calling for a transparent democratic process. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 30: Student protesters march a day before Mexicans go to the polls to choose a new president on June 30, 2012 in Mexico City, Mexico. Thousands of students from the movement known as YoSoy132 staged the march calling for a transparent democratic process. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration calling for electoral transparency in front of Mexico's Televisa network headquarters on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration front of Mexico's Federal Election Commission on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration calling for electoral transparency in front of Mexico's Federal Election Commission on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: A student protester looks into a crystal ball during a demonstration in front of Mexico's Federal Election Commission on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration calling for electoral transparency in front of Mexico's Televisa network headquarters on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration calling for electoral transparency in front of Mexico's Televisa network headquarters on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)
MEXICO CITY, MEXICO - JUNE 26: Student protesters stage a demonstration calling for electoral transparency in front of Mexico's Federal Election Commission on June 26, 2012 in Mexico City, Mexico. A popular university student movement known as YoSoy132 has been staging protests calling for a transparent democratic process in Sunday's upcoming presidential election. The movement began as opposition to the Institutional Revolutionary Party (PRI) presidential candidate Enrique Pena Nieto and the Mexican media's allegedly biased campaign coverage in favor of the PRI. (Photo by John Moore/Getty Images) (2012 Getty Images)