NYC Mayor Mamdani and AG James Sue to Block Trump Rule Denying Immigrants Over Welfare Use

New York City Mayor Zohran Mamdani and New York Attorney General Letitia James have filed a lawsuit challenging the Trump administration’s plan to expand the “public charge” rule, which allows the federal government to deny visas and green cards based on immigrants’ use of certain public benefits. The legal action comes ahead of the rule’s implementation, set for September 18, 2026, and aims to protect immigrant communities from what officials call an unjust and harmful policy.

Details of the Expanded Public Charge Rule

The Trump administration’s revised public charge rule broadens the criteria under which immigrants may be denied entry or permanent residency in the U.S. based on their use of welfare programs. The expanded list includes more public benefits such as Medicaid, Supplemental Nutrition Assistance Program (SNAP), and housing assistance. The government argues the change prevents immigrants who might rely on public aid from entering or remaining in the country.

However, critics contend the rule is vague and creates fear among immigrant communities, potentially forcing millions to forego essential services. Mayor Mamdani emphasized that the policy overturns over a century of precedent and was designed to isolate vulnerable New Yorkers by making them afraid to seek help.

Legal Challenge Led by Mamdani and James

Mayor Mamdani, who took office as New York City’s first socialist mayor in January 2026, joined forces with Attorney General Letitia James to file a joint lawsuit against the federal government. James is also spearheading a broader coalition including 21 states and the District of Columbia, demanding a federal court block the rule’s implementation.

James stressed that hardworking immigrant families should not have to choose between accessing public benefits and risking their immigration status. “This rule preys on that fear and counts on families forfeiting the food assistance, health care coverage, and other public benefits to which they are legally entitled,” she said. The attorney general’s office has fought similar policies before and is committed to preventing this expanded rule from taking effect.

Impact on Immigrant Communities and Public Services

Officials warn the new rule could lead up to 4 million immigrants disenrolling from healthcare and other benefits, even those legally eligible, due to fear their participation could jeopardize their immigration applications. This chilling effect threatens public health and welfare, especially in cities like New York where immigrants make up a substantial portion of the population.

Several other major cities and counties, including Chicago, San Francisco, Seattle, Santa Clara County, and King County, have joined New York’s legal challenge. Together, these jurisdictions argue the rule undermines public health and economic stability by forcing immigrants to avoid programs that support their well-being and integration.

Administration Response and Next Steps

The White House did not immediately respond to requests for comment regarding the lawsuit or the expanded public charge rule. The Trump administration plans to enforce the rule starting September 18, 2026, making the legal battle urgent.

The case has been brought before the U.S. District Court for the Southern District of New York, where the coalition seeks an injunction blocking the rule’s enforcement. With multiple states and cities involved, the case is expected to draw significant national attention as it highlights ongoing tensions over immigration policy under President Donald Trump’s administration.

As the legal challenge proceeds, immigrant communities and advocates remain vigilant, urging residents to continue accessing essential services despite the rule’s threat. The outcome could have lasting effects on immigration and public assistance policies nationwide.