Mr. Mamdani, the mayor-elect of New York City, addressed supporters at a venue in Brooklyn late Tuesday night.

In a victory for the Democratic party’s progressive wing, Mamdani defeated former governor Andrew Cuomo and Republican Curtis ...

Minutes after voters passed Proposition 50 during Tuesday's special election, Democratic Rep. Ami Bera announced his campaign ...

Democrats have also won governor races in Virginia and New Jersey as Californians voted to redraw election maps.

Detroit City Council President Mary Sheffield made history, becoming the city's first woman mayor in an election she led from start to finish.