GOP megadonor John Catsimatidis wants his fellow billionaires to line up behind Mayor Eric Adams’ longshot reelection bid to block the ascent of democratic socialist Zohran Mamdani, according to several people familiar with internal discussions and granted anonymity to speak freely about closed-door strategy.

Hours after Zohran Mamdani’s performance in New York City’s Democratic primary electrified national politics, Adams painted the 33-year-old democratic socialist as an entitled and inexperienced lawmaker trying to hoodwink New Yorkers with unrealistic campaign proposals. “This is a city not of socialism,” Adams said.