Mr. Mamdani roundly defeated Andrew M. Cuomo in the Democratic contest, widening his primary-night lead by a significant margin once ranked-choice tabulations were run.

President Donald Trump suggested he would order authorities to arrest New York City Democratic mayoral nominee Zohran Mamdani if he doesn’t allow Immigration and Customs Enforcement to operate in the city as mayor.

Zohran Mamdani has won a decisive victory in the primary race to become the Democratic candidate for the next mayor of New York City, according to The Associated Press, after building a commanding lead in first-choice results that shook the national political establishment.