The comments on Sunday come after thousands of Trump supporters took to the streets of the capital on Saturday to protest against the election results.
After night fell, the relatively peaceful demonstrations in Washington turned from tense to violent.
Videos posted on social media showed fistfights, projectiles thrown and club-swinging as Trump supporters clashed with those demanding they leave.
A variety of charges, including assault and weapons possession, were filed against those arrested, officials said. Two police officers were injured and several firearms were recovered by police.