In a fiery speech after his win, the next mayor of New York warned Trump that the city will stand united: "To get to any of us, you will have to get through all of us."

Jewish leaders had a mixed reaction to the election of Zohran Mamdani, who has repeatedly criticized Israel’s treatment of Palestinians and its conduct during the war in Gaza.

Mamdani, who will be New York City’s first Muslim mayor, defeated former governor Andrew Cuomo and Republican Curtis Sliwa. He will replace Mayor Eric Adams.

Just after 11 p.m. under the ornamental ceiling of the newly refurbished Paramount Theater in downtown Brooklyn, New York City Mayor-elect Zohran Mamdani walked onto a blue-curtained stage before hundreds of cheering supporters with a smile of victory across his face.

Zohran Mamdani, in his victory speech, celebrated New York’s immigrants, working class and young people and said the city could show the country how to defeat President Trump.

A diverse but younger-skewing crowd filled the Paramount Theater in Brooklyn with enthusiasm, dancing to hip hop and celebrating the socialist's win.

In Virginia, former U.S. Representative Abigail Spanberger, a Democrat, faces Winsome Earle-Sears, the state's Republican lieutenant governor. In New Jersey, Democratic U.S. Representative Mikie Sherrill is pitted against Republican businessman and former state lawmaker Jack Ciattarelli.

Hundreds of volunteers join the first town hall gathering hosted by Mr. Mamdani and the New York City chapter of the Democratic Socialists of America. Days later, canvassers begin field work for Mr. Mamdani, a longtime D.S.A. member who was endorsed by the local chapter.