National Guard troops could remain in Washington, D.C., until the fall, according to an internal memo.

“If it’s not possible to sustain at the current level with NG personnel, we need to establish the number of NG personnel (DCNG and out-of-state) we can sustain for an extended period — at least through Fall 2021 — and understand additional options for providing DoD support, to include use of reserve personnel, as well as active component,” Robert Salesses, assistant secretary for homeland defense and global security, wrote in a Jan. 20 email obtained by FOX 5.