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Federalism

Trump Loses Yet Another Sanctuary City Case—This Time Against New York City

Like numerous other federal courts in similar cases, this one rule sanctuary cities are protected by the Tenth Amendment.

Ilya Somin | 10.16.2026 6:45 PM

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Yesterday, in United States v. City of New York, yet another federal court ruled against the Trump administration in a sanctuary city case. "Sanctuary" jurisdictions are state and local governments that restrict their law enforcement agencies and other employees from assisting federal immigration enforcement and deportation efforts in various ways. In this case,  Judge Reyes of the US District Court for the Eastern District of New York upheld New York City laws restricting local law enforcement information-sharing and other assistance to federal immigration enforcers.

The court ruled that federal law does not preempt these policies, and that if if it did, there would be a violation of the anti-commandeering requirements of the Tenth Amendment:

Even were the Court to find that the United States has standing and the challenged provisions are preempted—both answered in the negative above—United States' claims would still fail because the anticommandeering doctrine of the Tenth Amendment to the Constitution of the United States precludes relief.

"The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." U.S. Const. amend. X….

The United States argues it is "not seeking to compel participation in immigration enforcement … but rather to remove Defendants' express and implicit obstacles to the Executive's duty to carry out its immigration enforcement duties…." New York City replies "if accepted, [the United States' claims] would require the City to affirmatively assist the federal government in enforcing immigration laws in violation of the Tenth Amendment's anticommandeering doctrine…." New York City is correct, at least partially.

The United States seeks injunctive and declaratory relief to preempt the challenged provisions… If the challenged provisions were struck, while........

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