Federal Judge Dismisses Trump Lawsuit Over Boston Sanctuary Protections

A federal judge dismissed a lawsuit filed by the Trump administration on May 29, 2026, which challenged the City of Boston’s sanctuary protections for undocumented immigrants. The ruling allows the city to maintain its current policies regarding the limitation of cooperation between local officials and federal immigration enforcement agencies.

The lawsuit, brought by the Department of Justice, sought to invalidate the Boston Trust Act and other municipal protections that restrict how the city interacts with U.S. Immigration and Customs Enforcement (ICE). The administration argued that these sanctuary policies obstructed the enforcement of federal immigration law and created risks to public safety.

The Boston Trust Act serves as the primary legal framework for the city’s sanctuary status. Under this policy, city employees, including members of the Boston Police Department, are prohibited from using city resources to assist in the enforcement of federal immigration laws unless required to do so by a judicial warrant or a specific court order.

The policy specifically restricts the use of city funds, personnel, and facilities to facilitate the identification, location, or arrest of individuals based solely on their immigration status. The city maintains that these restrictions are necessary to ensure that immigrant communities feel safe reporting crimes and accessing municipal services without fear of deportation.

In the legal challenge, the Department of Justice claimed that the City of Boston was actively shielding illegal immigrants from federal authorities. The administration asserted that such policies interfere with the federal government’s exclusive authority to manage national borders and interior immigration enforcement.

The City of Boston, led by Mayor Michelle Wu, defended the Trust Act by citing the Tenth Amendment to the U.S. Constitution. The city’s legal team argued that the federal government cannot “commandeer” state or local employees to administer federal regulatory programs. This legal principle, known as the anti-commandeering doctrine, has been a central pillar in previous legal battles between the federal government and sanctuary jurisdictions.

Mayor Michelle Wu has consistently stated that the city’s sanctuary policies are designed to protect the civil rights of all residents regardless of their immigration status. The administration under Wu has emphasized that maintaining trust between the Boston Police Department and the city’s diverse neighborhoods is essential for effective community policing and overall public safety.

The dismissal of the lawsuit prevents the federal government from forcing the Boston Police Department to proactively share non-public immigration data or dedicate local manpower to ICE operations. The ruling affirms that while federal immigration law remains the supreme law of the land, the federal government cannot compel local municipalities to use their own resources to enforce those laws.

The legal conflict reflects a broader national tension between federal immigration priorities and the autonomy of local governments. Several other cities and states have faced similar lawsuits from the Trump administration, with many resulting in rulings that support the right of local jurisdictions to decline participation in federal immigration sweeps.

The court’s decision on May 29, 2026, ensures that the Boston Trust Act remains in effect. The ruling does not prevent federal agents from operating within the city or conducting arrests based on federal warrants, but it maintains the barrier against the mandatory use of city resources to support those efforts.

The Department of Justice has not yet announced whether it intends to appeal the dismissal to a higher court.