D.C.’s mayor acknowledged local officials could do little to block what was expected to be a 30-day takeover of the capital’s policing. President Trump suggested his action might be expanded to other cities.

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.

The showdown in Washington is the latest attempt by Trump to test the boundaries of his legal authority to carry out his tough-on-crime agenda, relying on obscure statutes and a supposed state of emergency to speed up the mass deportation of people in the United States illegally.