Zohran Mamdani, the democratic socialist whose blend of populist ideas and personal magnetism catapulted his upstart candidacy, won the Democratic primary for mayor of New York City. Former Gov. Andrew M. Cuomo came in second. The incumbent, Eric Adams, will run as an independent in November.

New York City is using ranked choice voting in its Democratic mayoral primary election. Here's how it works: Rather than pick just one candidate, voters get to rank several in order of preference.