A coalition of 50 chambers of commerce representing immigrant-owned businesses filed suit Monday against Mayor Zohran Mamdani's proposal for city-operated grocery stores, alleging violations of New York civil rights laws and the state constitution's Equal Protection Clause. The Multicultural Business Coalition seeks a permanent injunction, citing antitrust concerns and tortious interference. The filing follows a Wednesday letter to City Hall, with one unverified report comparing the plan to a Walmart entry.