U.S. President Donald Trump said on Monday he was deploying 800 National Guard troops to Washington and temporarily taking over the city's police department, an extraordinary assertion of presidential power in the nation's capital.

The president is holding a news conference Monday morning to discuss efforts to fight crime and clean up the nation's capital.

The president also said he would consider calling in active-duty military troops if needed, launching an unprecedented effort to take charge of the nation’s capital.