Citadel CEO Ken Griffin is expanding company operations in Miami following a dispute with New York City Mayor Zohran Mamdani.The mayor recently released a video outside the billionaire's luxury penthouse to promote a tax on secondary homes worth over $5 million.Griffin criticized the campaign as creepy and harmful, warning that the policy targets successful businesses and threatens economic investment.Mamdani defended the tax proposal as a crucial step for reducing economic inequality and funding essential public services across the city.