Zohran Mamdani is the next mayor of New York City, and the congratulations have started to roll in from some business leaders. Mamdani's progressive agenda, which includes freezing rent, establishing city-owned grocery stores, free child-care, and taxing New York's millionaires a flat 2% tax, has put some on Wall Street on edge. The 34-year-old mayor-elect has also said he doesn't believe billionaires should exist. Some high-profile business leaders came out against Mamdani prior to election