A man tears an advertising campaign featuring leftist front-runner Andres Manuel Lopez Obrador (L) of the National Regeneration Movement (MORENA) alongside Latin American leaders Hugo Chavez and Lula in Mexico City, Mexico April 25, 2018. Photo: REUTERS/Ginnette Riquelme.

A man tears an advertising campaign featuring leftist front-runner Andres Manuel Lopez Obrador (L) of the National Regeneration Movement (MORENA) alongside Latin American leaders Hugo Chavez and Lula in Mexico City, Mexico April 25, 2018. Photo: REUTERS/Ginnette Riquelme.