Campaigning has officially begun for Mexico's presidential election on July 1. All four candidates have pledged to tackle corruption, seeking to capitalize on widespread voter discontent with the ruling party.
Mexican presidential hopefuls kicked off their campaigns on midnight Friday, exactly three months before voters head to the polls.
Recent opinion polls give Andres Manuel Lopez Obrador, 64, a veteran leftist and former Mexico City mayor, a double-digit lead in the race to succeed Pena Nieto.
Battling it out for second place are Ricardo Anaya (pictured above), 39, of the conservative National Action Party (PAN) and former finance minister Jose Antonio Meade, 49, representing the PRI. Independent Margarita Zavala, a former first lady, is polling in fourth spot.
All four candidates have pledged to tackle entrenched political corruption, which has fuelled public anger and led to billions of dollars being diverted away from public services.
Lopez Obrador, or "AMLO" as he is widely known, has promised to set Mexico on a new path. But critics say uncertainty surrounding his policies could hurt business.
Controversially, he has hinted at plans to reverse Pena Nieto's landmark privatization of the energy sector, abandon construction on a new airport for Mexico City and restart negotiations on an updated NAFTA trade deal with the United States and Canada from scratch. This is his third bid for the presidency.
Anaya, the youngest in the race, has sought to paint himself as a forward-thinking fresh face in Mexican politics. But his reputation has been tarnished by corruption allegations related to his family's suspected involvement in a money laundering scheme.
Meade has been particularly vocal about the case, prompting accusations from Anaya that the story is part of a concerted campaign by the ruling party to discredit him.
"There's an open war between the PRI and the PAN," Mexican political analyst Jose Antonio Crespo told Agence France Presse, adding that Lopez Obrador would be difficult to beat.
"They're hitting each other so hard they're both falling down, leaving Lopez Obrador a wide-open path to victory."