Biden-appointed judge deals Trump another sanctuary city defeat in major immigration fight

A Biden-appointed judge dealt the Trump administration another legal blow Thursday, tossing its lawsuit seeking to upend New York Citys sanctuary policies after ruling that the Justice Departments arguments amounted to a "backdoor around the Tenth Amendment."

The Trump administration sued New York City in July 2025, alleging that its sanctuary laws unlawfully hinder federal immigration enforcement by restricting local law enforcements cooperation with federal authorities.

The New York City case is one of more than two dozen lawsuits the Trump administration has filed against state and local jurisdictions over sanctuary and related policies restricting cooperation with federal immigration authorities.

But U.S. District Judge Ramón E. Reyes Jr. ruled that the federal government lacked standing to challenge New York Citys restrictions on honoring ICE detainers and rejected the Justice Departments claims that the citys sanctuary policies are preempted by federal law.

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New York City Mayor Zohran Mamdani celebrated the ruling in a Friday post on X, accusing the administration of attempting to turn city employees into immigration enforcement agents.

"The federal government tried to turn our public servants into deportation agents and force New York City to carry out ICEs cruel agenda. Today, a federal court rejected that effort and upheld our laws. Every New Yorker deserves to seek help from their city without fear of being targeted for deportation. We will stand by our immigrant neighbors, defend our laws and protect the promise that this city belongs to all of us," Mamdani wrote.

Reyes found the administration lacked standing because striking down the citys restrictions would not remedy its alleged harm because separate state laws restricting cooperation would remain in place.

But Abhishek Kambli, a former federal prosecutor and current partner at Holtzman Vogel, disputed that reasoning, arguing that the city's laws independently harm the federal government's authority regardless of whether similar state restrictions exist.

"The sovereign harm is done just by the fact that New York City has the law in the books, no matter what other factors prevent practical application of the United States's position," Kambli told Fox News Digital.

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Reyes also rejected the Justice Department's argument that New York City's sanctuary policies are overridden by federal immigration law.

"Even if the United States has standing — and it does not — its preemption claims fail," Reyes wrote. "All of the United States preemption claims — express, conflict and field — fail because the relevant federal statutes do not regulate private actors."

The judge pointed to the Tenth Amendment's anti-commandeering doctrine, which prevents the federal government from forcing state and local governments to u