U.S. President Donald Trump is promising new steps to tackle homelessness and crime in Washington, prompting the city’s mayor to voice concerns about the potential use of the National Guard to patrol the streets in the nation’s capital.

Trump wrote in a social media post that he would hold a White House news conference on Monday to discuss his plans to make the District of Columbia “safer and more beautiful than it ever was before.”

“The Homeless have to move out, IMMEDIATELY,” Trump wrote Sunday. “We will give you places to stay, but FAR from the Capital. The Criminals, you don’t have to move out. We’re going to put you in jail where you belong.”

Last week, the Republican president directed federal law enforcement agencies to increase their presence in Washington for seven days, with

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