Washington, D.C., officials are taking the Trump administration to court over what they call an unlawful federal seizure of the city’s police force, a move that’s now escalated into a showdown over immigration enforcement and the city’s limited right to self-government.

DC Attorney General Brian Schwalb filed a lawsuit Friday against the Trump administration over its moves to take over the city’s police department and appoint an emergency commissioner, the latest sign of pushback from district officials against the federal takeover.