Zohran Mamdani delivered a political earthquake Tuesday in New York City’s Democratic mayoral primary, riding progressive demands for change in a city facing an affordability crisis to the brink of a stunning victory.

Ranked-choice voting results in New York City’s Democratic primary for mayor will be released next week. Zohran Mamdani led the first-round ballots.

Mamdani, 33, a two-term Queens assemblyman, replicated on a citywide scale what fellow socialist Rep. Alexandria Ocasio-Cortez accomplished in one congressional district when she toppled former Congressman Joe Crowley in the 2018 Democratic primary, with a new coalition that included younger voters.