Trump Administration Targets Sanctuary Policies with Legal Action
The Trump administration is intensifying its crackdown on illegal immigration, with states and cities resisting sanctuary policies facing numerous lawsuits from the U.S. Department of Justice. Since President Trump resumed office in January 2025, the administration has initiated 27 legal actions against over 20 jurisdictions regarding these policies, according to the Justice Department. Within the past three months alone, lawsuits have been filed against at least six locations, including counties in Connecticut, Maryland, New Jersey, New York, Michigan, and the city of Philadelphia. The goal is to limit the operations of U.S. Immigration and Customs Enforcement (ICE) agents.
State and Local Policies Under Fire
Sanctuary policies typically aim to reduce immigration enforcement in public areas, restrict cooperation between local law enforcement agencies and federal immigration authorities, and prevent local and federal officials from concealing their identities during operations. Cassandra Charles, a senior staff attorney at the National Immigration Law Center, emphasized that these protection policies are designed to enhance community safety and foster trust between residents and public authorities.
Rise of Sanctuary Policies Amid Federal Pushback
While some cities have maintained sanctuary policies since the 1980s, many states and municipalities are enacting new ones in response to the Trump administration’s aggressive deportation initiatives. Charles described the current surge in litigation as “unprecedented,” suggesting that the administration may be misinterpreting the Supremacy Clause of the U.S. Constitution, which asserts that federal law supersedes state law. She argued that this clause does not grant the federal government the authority to dictate the laws that states can implement or require states to assist in enforcing federal law.
Justice Department’s Legal Arguments
In contrast, the Justice Department contends that sanctuary laws contradict established constitutional principles and hinder federal law enforcement efforts. Kirsten Pels, a spokesperson for the department, asserted that local governments lack the authority to obstruct federal enforcement or impose regulations on federal agencies. “These lawsuits seek to reaffirm fundamental aspects of our constitutional structure,” Pels stated.
Mixed Outcomes in Court Proceedings
The Department of Justice’s lawsuits have yielded mixed results. In May 2025, the department filed against four New Jersey cities—Hoboken, Jersey City, Newark, and Paterson—for policies limiting local cooperation with federal immigration authorities. However, a New Jersey district judge appointed by President Biden dismissed the lawsuit, stating that the cities’ policies did not impede ICE operations under the state’s sanctuary law. Conversely, a recent ruling in Pennsylvania favored the administration concerning Philadelphia’s new policy restricting ICE agents from disguising their identities.
Conflicts over Local Enforcement Policies
The month prior, the Trump administration sued Philadelphia to halt the enforcement of new regulations preventing immigration agents from wearing masks or using unmarked vehicles. A Trump-appointed judge granted a preliminary injunction against the city, referencing the Supremacy Clause and remarked that the policy attempted to evade established constitutional obligations. The law was one of several approved by the Philadelphia City Council aimed at regulating ICE operations.
Additional Lawsuits across Multiple States
Maryland’s recent legislative actions have also garnered the attention of the Justice Department. A new law, effective May 31, prohibits local officials from inquiring about individual immigration status, detaining people on the basis of suspected immigration violations, or transferring individuals to federal authorities without a warrant. The Justice Department has moved to block this law, arguing that it obstructs federal enforcement efforts.
In late April, local sheriffs from 17 Maryland counties filed a lawsuit challenging the new law, claiming it places them in an untenable position. They argued that compliance could lead to legal repercussions from the state, while failing to cooperate with ICE could expose them to federal prosecution. Meanwhile, Senator Clarence Lamb, who sponsored the new law, dismissed concerns about its legality, asserting that it merely restricts state employees and does not impede ICE’s authority. “Our taxpayers should not bear the burden of enforcing federal immigration laws,” he emphasized.
