“The conventional wisdom would tell you that I am far from the perfect candidate,” Mamdani said in his victory speech in Brooklyn on Tuesday night.

Zohran Mamdani wasted little time as mayor-elect of New York City before making clear that he sees part of his new role as standing up to the president of the United States, who had threatened not on...

Mr. Mamdani, who was born in Uganda to parents of Indian descent and moved to New York City as a boy, will also be the first South Asian mayor, the city’s youngest mayor in more than a century, its s...