London Breed, the president of the San Francisco Board of Supervisors, will be the city's next mayor after eight days of ballot-counting all but eliminated rival candidate Mark Leno, who conceded the race Wednesday afternoon. Breed, 43, will become San Francisco's first black female mayor and the city's second female mayor, after Sen. Dianne Feinstein (D-Calif.); San Francisco will become the largest U.S. city currently led by a woman. Leno would have been San Francisco's first openly gay mayor. All three frontrunners were Democrats. Breed briefly took over as mayor when Mayor Ed Lee (D) died of a heart attack in December. She will serve out the remainder of Lee's term, until 2020, and face the voters again in 2019.

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