Major U.S. cities, including Chicago, San Francisco, and Seattle, are set to join a legal challenge against a federal policy, expanding the coalition of plaintiffs in the case. The move signals growing opposition among urban governments to the disputed regulations, which critics argue could have significant financial and operational impacts. Legal experts suggest the consolidated effort may strengthen the cities' position in court, though the specifics of the lawsuit remain under review. The development underscores deep divisions over the policy’s implementation and its potential consequences for municipal budgets and services.


Mamdani said that other major cities like Chicago, San Francisco and Seattle will also be joining the lawsuit.