Why Zohran Mamdani’s big night as the Democratic party’s new kingmaker matters for every Fortune 500 CEO in every city and state

Last year, Zohran Mamdani was a 33-year-old state assemblymember running second in his own party’s primary to disgraced former governor Andrew Cuomo, who entered the 2025 New York City mayoral race as the frontrunner—backed by both the Democratic establishment and endorsed by President Donald Trump. Fourteen months ago, polling firms were running ranked-choice simulations showing Cuomo defeating Mamdani 56 to 44 in the Democratic primary. Now, that assemblyman is the most powerful Democrat in America’s most powerful city, who, on Tuesday, went three for three in congressional endorsements. All three of the Democratic Socialist’s endorsed congressional candidates won their primaries, including two who unseated sitting Democratic incumbents. Former city comptroller Brad Lander defeated Rep. Dan Goldman in NY-10; 32-year-old first-time candidate Darializa Avila Chevalier, an investigator at a public defender’s office, ousted five-term incumbent and Congressional Hispanic Caucus Chair Rep. Adriano Espaillat in NY-13; and the Mamdani-backed state Assemblywoman Claire Valdez beat out Brooklyn Borough President Antonio Reynoso in NY-7, the latter of whom was endorsed by outgoing Rep. Nydia Velázquez. All three will almost certainly win in November in their deep-blue districts, placing three Mamdani allies in Congress come January. The sweep was the clearest show of force yet of Mamdani’s political power, just six months into office. Treasury Secretary Scott Bessent wasted no time Wednesday morning calling Mamdani “the leader of the Democratic Party.” Bessent may have very well said what every business leader, from Midtown Manhattan in Mamdani’s own backyard to those who left for Miami might be thinking: Is Tuesday night’s win a New York story, or evidence of something larger? “There’s a tide across the country that’s an economic populist tide,” said Ben Max, director at New York Law School’