New Haven Fights Back Against Trump’s Sanctuary City Crackdown with Top Legal Heavyweights

The Trump administration’s latest assault on sanctuary cities has landed in New Haven’s backyard, but the city isn’t going down without a fight. The Department of Justice filed suit on April 13 seeking to overturn New Haven’s “Welcoming City” executive order, which limits local cooperation with federal immigration enforcement. The lawsuit claims these policies violate the Constitution’s Supremacy Clause by obstructing federal immigration efforts.

But New Haven, joined by Governor Ned Lamont and Attorney General William Tong, has enlisted a powerhouse legal team to push back. Former federal prosecutor Chris Mattei, known for prosecuting corruption and representing Sandy Hook families against Alex Jones, and Harold Koh, former Yale Law dean and veteran Obama official, have agreed to represent the city pro bono. Koh’s Yale Law clinic will also assist in the defense.

Mayor Justin Elicker made clear that New Haven’s order simply prevents city employees, including police, from asking about immigration status or using city resources to enforce federal immigration laws unless required by law. The goal is to ensure immigrants feel safe reporting crimes and accessing services without fear of deportation.

“This is about standing up for our values and protecting our community,” Elicker said. “We will not be intimidated into submission.” City Corporation Counsel Allie Jacobs called the federal lawsuit “baseless litigation,” emphasizing that New Haven’s policies comply fully with the law.

Mattei framed the defense as a civic duty against unconstitutional federal overreach. “We’re Americans first and lawyers second,” he said. Koh was even more blunt, calling the Trump administration’s targeting of sanctuary policies illegal and an attempt to punish dissent.

New Haven’s fight is part of a broader pattern of Trump’s administration weaponizing the courts to undermine local autonomy and immigrant protections. With a legal dream team on their side, New Haven is sending a clear message: they will defend their sanctuary policies and resist authoritarian overreach at every turn.