Mr. Mamdani’s victory upended city politics and reverberated nationally. He relied on a memorable message, charisma and a strong ground game.

Perhaps he will hunt them down at the tables of Masa, where sushi can go for almost $1,000 a head. Or maybe he’ll track them to the bar at the Plaza hotel, or else evict them from their penthouses overlooking Central Park.

Billionaires like Bill Ackman and David Sacks have taken to X to criticize New York City mayoral candidate Zohran Mamdani’s views on income inequality.