The DC National Guard began appearing in the nation’s capital on Tuesday after President Donald Trump announced a day earlier he is deploying guard troops and placing Washington, DC’s police department “under direct federal control,

Federal agents who typically investigate drug lords, weapons traffickers or cyber criminals have fanned out across the nation’s capital.

Trump has the authority to temporarily take control of the local police. For the president to mount a full federal takeover of the city, however, Congress would first need to repeal the 1973 Home Rule Act, which granted D.C. a level of self-governance.