The U.S. capital Washington sued Donald Trump on Friday over his attempted takeover of the city's police force, escalating a power struggle between the U.S. president and the city's leadership.

Washington, D.C. — 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.