Mamdani Sues Trump Administration Over New Immigration Rule Targeting Public Benefits

New York City Mayor Zohran Mamdani is set to sue the Trump administration in court over a new immigration rule that could give federal officials broader discretion to consider immigrants’ use of public benefits when deciding certain visa, green card, and admission applications.

Mamdani is leading a coalition of local governments challenging the rule in federal court, while New York Attorney General Letitia James is separately leading a lawsuit joined by 21 other states and Washington, D.C.

The legal battles mark a major confrontation over the administration’s latest expansion of the “public charge” framework, a long-running provision of U.S. immigration law.

New Public Charge Rule Faces Immediate Court Challenge

Lawsuits were filed in the Southern District of New York as the new rule approached its effective date.

Under the Trump administration’s rule, immigration officials would have broader authority to consider means-tested public benefits when assessing whether certain applicants could become dependent on government assistance.

The federal rule rescinds the Joe Biden administration’s 2022 regulations and restores broader discretion to immigration officers. DHS says the change is intended to reinforce self-reliance and allow officers to consider all relevant circumstances when determining whether someone is likely to become a public charge.

The Zohran Mamdani-led lawsuits argue that the Trump administration’s expanded approach exceeds DHS authority and does not provide sufficiently clear standards for determining which benefits could affect an immigration decision.

Medicaid, SNAP and Other Benefits Become the Flashpoint

New York officials and the other plaintiffs are particularly concerned about programs such as Medicaid, SNAP and school meal assistance.

The cities argue that uncertainty surrounding the rule could discourage eligible immigrant families from using government programs, even when they are legally entitled to receive them.

New York Attorney General Letitia James said the rule could force families to weigh access to healthcare and food assistance against concerns about future immigration applications.

The administration takes a different view.

DHS has argued that the policy restores a principle that immigrants should be able to support themselves and says the change is intended to protect public resources and discourage dependence on government assistance.

Why New York Says Billions Could Be at Stake

The legal dispute extends beyond immigration policy.

The states argue that changes in benefit participation could also affect their budgets and federal funding.

According to the states’ lawsuit, nationwide reductions in federal Medicaid and CHIP payments could amount to approximately $4.05 billion annually, with the plaintiff states potentially accounting for about $2.2 billion of that amount.

The plaintiffs say local governments could also face additional costs if families stop accessing preventative healthcare, food assistance and other services and later require more expensive emergency support.

Those financial estimates are allegations contained in the lawsuit and will be contested as the case moves through federal court.

Mixed-Status Families Are a Major Concern

One of the biggest issues raised by local officials and immigrant advocacy groups is the impact on mixed-status families, where some household members are U.S. citizens and others have different immigration statuses.

The lawsuits and advocates argue that confusion about the rule could lead parents to avoid applying for benefits on behalf of eligible children.

New York City says the potential chilling effect could extend beyond people directly subject to public-charge assessments.

Zohran Mamdani said the city is already seeing concerns among residents uncertain whether accessing assistance could affect their immigration circumstances.

The federal government says the rule applies within the legal framework governing public-charge determinations, rather than creating a blanket prohibition on immigrants receiving public benefits.

A Fight Over Federal Immigration Authority

The lawsuits ultimately test how much discretion DHS has in applying the public-charge provision.

The concept dates back more than a century, but its interpretation has shifted significantly between administrations.

The first Trump administration expanded the range of benefits it could consider. The Biden administration later issued a 2022 regulation narrowing the framework, primarily excluding non-cash benefits from public-charge determinations.

The new Trump administration rule rescinds that 2022 framework and restores a broader approach.

New York and its allies argue that DHS cannot make such a sweeping change without clearer congressional authorization and that the agency failed to adequately account for the potential consequences.

The administration maintains that DHS has the authority to interpret and administer the public-charge provision.

Mamdani’s First Major Immigration Showdown

For Mamdani, the lawsuit puts immigration policy at the center of his administration’s relationship with Washington.

New York City is joined in the local-government lawsuit by Chicago, San Francisco, Seattle, Santa Clara County and King County, among others.

The separate state lawsuit is being led by New York and includes California, Illinois, Colorado, Connecticut, Delaware, Hawaii, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Jersey, New Mexico, Nevada, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia, Washington and Wisconsin, along with Washington, D.C.

The courts will now determine whether the federal government can implement the expanded public-charge framework as written.

For immigrants and mixed-status families, the immediate issue is whether the rule will change how public benefits factor into future immigration decisions. For states and cities, the lawsuits also raise questions about healthcare costs, federal funding, and the division of authority between Washington and local governments.

The legal fight is only beginning, but the stakes extend far beyond New York.