A climate scientist and former mayor, Ms. Sheinbaum became the first woman and Jewish person elected as president of the country.

A scientist and former mayor of Mexico City, won her nation’s elections on Sunday in a landslide victory that brought a double milestone: She became the first woman, and the first Jewish person, to be elected president of Mexico.

Early results indicated that Ms. Sheinbaum, 61, prevailed in what the authorities called the largest election in Mexico’s history, with the highest number of voters taking part and the most seats up for grabs.

It was a landmark vote that saw not one, but two, women vying to lead one of the hemisphere’s biggest nations. And it will put a Jewish leader at the helm of one of the world’s largest predominantly Catholic countries.

Ms. Sheinbaum, a leftist, campaigned on a vow to continue the legacy of Mexico’s current president and her mentor, Andrés Manuel López Obrador, which delighted their party’s base — and raised alarm among detractors. The election was seen by many as a referendum on his leadership, and her victory was a clear vote of confidence in Mr. López Obrador and the party he started.

Mr. López Obrador has completely reshaped Mexican politics. During his tenure, millions of Mexicans were lifted out of poverty and the minimum wage doubled. But he has also been a deeply polarizing president, criticized for failing to control rampant cartel violence, for hobbling the nation’s health system and for persistently undercutting democratic institutions.

Still, Mr. López Obrador remains widely popular and his enduring appeal propelled his chosen successor. And for all the challenges facing the country, the opposition was unable to persuade Mexicans that their candidate was a better option.

“We love her, we want her to work like Obrador,” Gloria Maria Rodríguez, 78, from Tabasco, said of Ms. Sheinbaum. “We want a president like Obrador.”

Ms. Sheinbaum won with at least 58.3 percent of the vote, according to preliminary results, while her closest competitor, Xóchitl Gálvez, an entrepreneur and former senator on a ticket with a coalition of opposition parties, had at least 26.6 percent.

CLICK HERE to read more.