Why It Matters
The federal government is challenging Maryland’s sanctuary law as a constitutional violation that impedes immigration enforcement. The lawsuit signals an escalation in the Trump administration’s effort to override state and local restrictions on cooperation with federal immigration authorities.
What Happened
The Department of Justice filed suit against Maryland in federal court this week, alleging that the state’s Community Trust Act represents an “active and deliberate effort” to obstruct federal immigration enforcement. The lawsuit targets the law’s requirement that state correctional facilities obtain a judicial warrant—rather than an administrative warrant—before transferring individuals to federal custody.
The Community Trust Act took effect without Governor Wes Moore’s signature or veto, becoming law under Maryland’s 10-day default provision. Moore’s office said the state supports federal-local coordination “when that coordination makes our people safer” but will not allow federal immigration agents to “deputize our law enforcement officers to do immigration work.”
The specific trigger for the lawsuit involved Worcester County Jail, where a warden informed federal Immigration and Customs Enforcement on May 29, 2026, that the facility would no longer honor ICE detainers. The jail subsequently denied an ICE pickup request and refused to release an individual to federal custody.
The DOJ contends that the Community Trust Act violates the supremacy clause of the Constitution and that federal immigration law permits arrests through administrative warrants—a position the state rejects through its judicial-warrant requirement. Attorney General Anthony Brown is named as a defendant in the federal lawsuit.
By the Numbers
20 — other lawsuits filed by the DOJ against Colorado, Connecticut, Illinois, and New York over sanctuary policies
17 of 24 — Maryland sheriffs who sued the state in late May over the Community Trust Act, alleging it “interferes with the ability of sheriffs and local detention centers to coordinate with ICE”
May 29, 2026 — date of the Worcester County Jail incident that prompted the federal action
10 days — timeframe under Maryland law for the governor to sign or veto legislation before it becomes law automatically
Zoom Out
Maryland joins a growing list of states implementing restrictions on immigration enforcement cooperation. In February 2025, the U.S. Attorney General directed the DOJ civil division to identify and challenge state and local sanctuary policies. The current lawsuit is one of at least 20 similar actions filed against states including Colorado, Connecticut, Illinois, and New York.
Sanctuary laws reflect a broader divide over immigration enforcement authority. Some states and localities argue that decoupling local law enforcement from federal immigration operations allows police to focus on community safety and builds trust with immigrant communities. The federal government contends that such laws obstruct the enforcement of lawful immigration statutes and create public safety risks.
Associate U.S. Attorney General Stanley Woodward framed the dispute in jurisdictional terms: “Federal immigration officers merely enforce the laws that our Nation’s elected representatives in Congress passed, reflecting the will of We the People. Today’s suit proves that this Department will never stand for such lawless action from blue state leaders.”
Legal and Political Tensions
The lawsuit has widened an existing split between state and local officials in Maryland. In late May, 17 of the state’s 24 sheriffs filed their own complaint against the Community Trust Act, claiming it undermined their ability to work with federal authorities. Moore’s position—supporting federal cooperation when it advances local safety but resisting what he characterized as federal overreach—reflects broader Democratic resistance to immigration enforcement expansion.
What’s Next
The case will proceed in Maryland federal court, where judges will determine whether the Community Trust Act violates the supremacy clause and whether the state’s judicial-warrant requirement is a lawful exercise of state authority or an unconstitutional obstruction. The outcome could shape how other states structure their cooperation—or non-cooperation—with federal immigration enforcement.
Maryland has signaled it will defend the law. The state’s legal position will likely be tested against similar challenges in other jurisdictions, making this lawsuit part of a larger national reckoning over which government entities can decide immigration enforcement priorities.