Leading by more than 20 points in the polls Andres Manuel Lopez Obrador has successfully tapped voters' anger with a seemingly never-ending series of corruption scandals and horrific violence that left a record 25,000 murders last year.
A group of more than 1,200 migrants from Central and South America has arrived in Mexico. Their march towards the US border has prompted President Donald Trump to demand the Mexican government take action or face the consequences.
Mexican President Pena Nieto is being challenged from the right and the left, and with rampant crime and corruption laid at his feet, the Mexican elections are ripe for newcomers.
Trump's warning came as the opposition coalition in Venezuela called a nationwide strike for Thursday to kick off a "final offensive" aimed at forcing Maduro from office through early elections.
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