In addition to the Lincoln Memorial, which is usually illuminated at night, the outage also affected the Korean War Memorial and the lights on the Memorial Bridge, a Pepco spokesman said.

He asked his attendant if he had ever seen the Lincoln Memorial at night, then led a small entourage on an unplanned visit to the Lincoln Memorial, where he talked to young anti-war protesters.

Chalian said it showed a stark contrast with the Trump administration: “Those lights that are shooting out from the Lincoln Memorial along the reflecting pool, it’s almost extensions of Joe ...