A historic election will take place in Mexico on Sunday as nearly 100 million Mexicans at home and abroad choose a new president.

Iran PressAmerica: Voters will pick between Claudia Sheinbaum and Xóchitl Gálvez, who will revolutionize Mexican presidential elections.

Reliable polling shows that Mexico is likely to elect a woman for the first time in its history, says Rafael Fernández de Castro, a professor at UC San Diego's School of Mexican-US Studies.

"We will be the first North American country, not the US, not Canada who has a woman in the presidency," Fernández de Castro said.

The vote is run by the National Electoral Institute.

Alejandro Araiza, a staff member, said, "This election is the largest in the history of Mexico, both in number of offices and the number of voters. Nationally and internationally, 98 million will vote."

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