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.

Cuomo, who long led polls in the Democratic primary, conceded Tuesday night before vote-counting was even finished.

The race’s ultimate outcome will still be decided by a ranked choice count. But Mamdani was in a commanding position after polls closed Tuesday night.