WASHINGTON (AP) — The nation’s capital challenged President Donald Trump’s takeover of its police department in court on Friday, hours after his administration stepped up its crackdown on policing by naming a federal official as the new emergency head of the department, with all the powers of a police chief.

The suit, filed in federal court, is the biggest pushback from city officials since President Donald Trump invoked a provision of the Home Rule Act — the 1970s law that allows for limited self-governance by D.C.’s government — which allows the president to request MPD’s services to address “special conditions of an emergency nature.”