DOJ Sues Maryland, Alleging New State Immigration Law Obstructs Federal Authority

The U.S. Department of Justice has launched a sweeping legal challenge against the state of Maryland, filing a federal lawsuit that seeks to strike down a newly enacted state law limiting local law enforcement's cooperation with federal immigration authorities. The suit, filed in the U.S. District Court for the District of Maryland, marks a dramatic escalation in the ongoing battle between the federal government and states over interior border enforcement.[1]

At the center of the dispute is the Maryland Trust Act of 2026, which prohibits state and local police from honoring civil detainer requests from U.S. Immigration and Customs Enforcement (ICE). The legislation also bans local jails from entering into 287(g) agreements, a federal program that deputizes local officers to perform certain immigration enforcement functions.[3]

In its 42-page filing, the Justice Department argues that the state law blatantly violates the Supremacy Clause of the U.S. Constitution. Federal prosecutors assert that states cannot actively obstruct the enforcement of federal law, claiming Maryland is creating a "dangerous safe haven" for undocumented individuals, including those with criminal records, by shielding them from federal agents.[2]

Maryland officials immediately pushed back against the federal intervention. The state's Attorney General vowed to vigorously defend the law, arguing that the Tenth Amendment protects states from being commandeered to do the federal government's job. "Maryland police are here to protect our communities, not to act as an extension of federal deportation forces," the Attorney General stated during a press conference in Annapolis.

The lawsuit represents a significant maneuver in the administration's renewed crackdown on so-called "sanctuary" jurisdictions. With federal deportation operations surging nationwide, the administration views state-level non-cooperation laws as the primary bottleneck to executing its interior enforcement agenda. By targeting Maryland, the DOJ is signaling a zero-tolerance approach to state-level resistance.[3]

Immigrant advocacy groups rallied outside the Maryland statehouse following the lawsuit's announcement. Organizers argue that when local police act like ICE agents, undocumented residents become afraid to report crimes, seek medical help, or act as witnesses. They maintain that separating local law enforcement from federal immigration duties makes communities safer overall.

Conversely, proponents of the DOJ's move point to instances where local jails released individuals with active ICE detainers who subsequently committed violent crimes. They argue that a patchwork of state immigration policies undermines national security, creates an unmanageable system for federal agents, and violates the fundamental principle that immigration is a strictly federal purview.[2]

Legal experts note that the Supreme Court has historically offered mixed signals on this complex constitutional intersection. While the landmark Arizona v. United States (2012) affirmed that the federal government has broad, exclusive power over immigration, the anti-commandeering doctrine established in Printz v. United States (1997) dictates that Washington cannot force state officials to enforce federal laws.[1][3]

The DOJ has requested a preliminary injunction to halt the implementation of the Maryland law while the case proceeds. If the federal judge grants the injunction, Maryland police and local jails could be forced to resume honoring ICE detainers and cooperating with federal agents within weeks.[1]

The case is widely expected to be fast-tracked to the appellate level and potentially the Supreme Court. With at least 14 other states maintaining similar laws restricting ICE cooperation, the final ruling will likely determine the future of state-level immigration resistance nationwide.[3]