(CNN) Andres Manuel Lopez Obrador has declared victory in Mexico's presidential election, as preliminary results showed that the leftist veteran politician, who had presented himself as an agent of change, secured a landslide win.

President-elect Lopez Obrador is estimated to have received over 53% of the vote, more than double the total of his closest rival, according to the country's electoral commission.

"Today, they have recognized our victory," Lopez Obrador, known by his initials AMLO, told a crowd of jubilant supporters at an event in Mexico City late Sunday local time.

President Enrique Peña Nieto called Lopez Obrador shortly beforehand to congratulate him and pledged to help him carry out an orderly transition. Lopez Obrador will formally take power on December 1.

Andres Manuel Lopez Obrador waves to his supporters after an apparent victory in Mexico's general election on July 1, 2018.

Lopez Obrador had dominated the polls in the run up to Sunday's vote, at times holding a 20-point lead over his rivals. Within two hours of polls closing, three of his main rivals had conceded defeat.

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