Mamdani, a 33-year-old state assemblyman representing northwest Queens, last month shocked the political establishment by trouncing the longtime front-runner, former Gov. Andrew Cuomo, whose name recognition, experience and support of billionaires and corporations, made him the favorite.

Fresh off losing New York’s Democratic primary for mayor to Zohran Mamdani, former Gov. Andrew Cuomo on Monday ramped up his efforts to push the incumbent mayor, Eric Adams, out of the race.

The United Federation of Teachers’ endorsement was the latest major labor union to coalesce around the Democratic mayoral nominee.