House Oversight questions mayors of New York, Chicago, Boston and Denver on sanctuary policies and enforcement

A House Committee on Oversight and Government Reform hearing on sanctuary-city policies drew sharp exchanges on federal immigration enforcement, public-safety trade-offs and a recent Justice Department controversy that led several federal prosecutors to resign.

The committee’s Republican majority pressed mayors of New York City, Chicago, Boston and Denver to explain local rules that limit cooperation with Immigration and Customs Enforcement (ICE). Committee leaders said those rules can keep criminal noncitizens from being handed to federal authorities; the mayors and a Cato Institute witness countered that well‑crafted local policies help preserve trust with immigrant communities and reduce crime.

Why it matters: Committee members argued that lack of cooperation with ICE detainers forces federal agents to make arrests in public and increases risks for officers and residents. Mayors said aggressive local involvement in federal immigration enforcement would chill reporting of crimes, strain city services and undermine public-safety work that they run every day.

House Republicans repeatedly asked whether the four cities qualify as “sanctuary” jurisdictions and pressed the mayors on whether they would honor ICE requests in custodial situations that involve a criminal warrant. Mayor Eric Adams of New York, Mayor Brandon Johnson of Chicago, Mayor Michelle Wu of Boston and Mayor Mike Johnston of Denver each said they and their departments cooperate with federal authorities on criminal warrants. The mayors argued, however, that state and local statutes and court precedent limit holding people beyond lawful release…