Mexicans began voting Sunday in a national referendum promoted by President Andres Manuel Lopez Obrador on whether to investigate and prosecute his predecessors for alleged corruption.

Mexico holds referendum on prosecuting ex-presidents

Three former Mexican presidents - Enrique Peña Nieto, Felipe Calderon, Carlos Salinas de Gortari, 14 senior politicians and one journalist all are facing a major corruption scandal over a leaked document.

Decoding Mexico's corruption scandal that involves three former presidents

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Mexico holds referendum on prosecuting ex-presidents

Decoding Mexico's corruption scandal that involves three former presidents