From the Guardian live feed:
US troops from the 82nd Airborne Division have been moved from their base in Fort Bragg, North Carolina, to the outskirts of the Washington, DC, according to multiple reports from unnamed Defense Department officials.
Around 700 members of the 82nd are now poised at Joint Base Andrews in Maryland and Fort Belvoir in Virginia, the Associated Press reports. Joint Base Andrews is where Air Force One takes off when the president goes on trips and is minutes from the White House, just outside the boundary of the capital.
In addition, 1,400 more soldiers are ready to be mobilized within an hour, AP writes, according to two Defense Department officials, who are not named.
The soldiers are armed and have riot gear, and they also have bayonets, the agency reports.
It is not clear if this is (almost literal) saber-rattling from the president, who has been talking hardline on law and order, displaying hardware in order to intimidate, or if those troops will really be seen on the streets of Washington.
The president has the jurisdiction to send US troops into the federal capital pretty freely, without invoking legislation or seeking permission as would be the case with a state.