The White House went dark on Sunday night (Washington time) as protesters set buildings and cars on fire in chaotic scenes just outside its grounds.
The move sparked debate about whether it was actually that unusual, with some saying it never happened and others suggesting it was a regular occurrence.
The Guardian reported that the lights were only ever turned off when a President died.
Meanwhile footage has emerged of protesters smashing and overturning cars, and vandalising businesses close to the White House as rallies turned violent.
As demonstrations continued past an 11pm curfew, Washington police said they were responding to multiple fires that were "intentionally set" around the city.