Zohran Mamdani has won New York City’s Democratic mayoral primary. A new vote count Tuesday under the city’s ranked choice voting system confirmed the progressive legislator’s stunning upset of former Gov.

Mr. Mamdani’s victory upended city politics and reverberated nationally. He relied on a memorable message, charisma and a strong ground game.

Democratic mayoral candidate Zohran Mamdani could clinch victory Tuesday when the New York City Board of Elections releases the first look at the ranked-choice voting results from the June 24 primary.