President Donald Trump participates in a trilateral signing ceremony Friday with Armenian Prime Minister Nikol Pashinyan and Azerbaijan President Ilham Aliyev in the State Dining Room of the White House. AP

President Donald Trump planned Monday to flex his significant law enforcement power over Washington, declaring that he would clear the city of homeless people and crack down on crime. He may call up the National Guard, according to one official familiar with the matter.

Trump will announce additional federal moves at a White House news conference at 10 a.m., he said on social media. The decision comes as the administration has already mobilized FBI agents in recent days in overnight shifts to help local law enforcement prevent carjackings and violent crime in the city, officials said

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