Mamdani vows to ‘govern as a democratic socialist’ for every construction worker, halal cart vendor and spice-wielding cook in New York City

Zohran Mamdani became mayor of New York City on Thursday, taking over one of the most unrelenting jobs in American politics with a promise to transform government on behalf of the city’s striving, struggling working class.

Mamdani, a Democrat, was sworn in at a decommissioned subway station below City Hall just after midnight, placing his hand on a Quran as he took his oath as the city’s first Muslim mayor.

After working part of the night in his new office, Mamdani returned...