From WMATA at 8:05am:

“Red Line: Delays now up to 30 minutes due to track problem. Trains are single tracking btwn Dupont Circle & Van Ness.”

Update from WMATA:

“Branch Avenue-bound Green Line train offloading at College Park, doors. Next train directly behind. 8:24am”

A reader reports delays at the Petworth station.

Thanks to @wowindc for sending a shot of Gallery Place at 8:40am: