"If anyone can show a nation betrayed by Donald Trump how to defeat him, it is the city that gave rise to him," Mamdani said at his victory speech in Brooklyn Tuesday night.

President Donald Trump on Monday night urged voters to support former New York governor Andrew Cuomo in his bid to become New York City's next mayor.

The New Jersey race has emerged as the most hotly contested campaign, with opinion polls showing Democrat Mikie Sherrill, a congresswoman and former Navy pilot, holding a narrow lead over her Republi...