New York City’s effort to close a multibillion-dollar budget gap has triggered a high-profile clash between Mayor Zohran Mamdani and Wall Street leaders, including Citadel founder Ken Griffin. Mamdani’s proposed “pied-à-terre” tax on luxury second homes has become a flashpoint in a broader debate over whether the city should raise more revenue from wealthy residents or focus on restraining spending growth. Wall Street veteran Whitney Tilson, Partnership for New York City CEO Steve Fulop, and