Armed supporters of President Trump stormed the Capitol building and forced a lockdown.
Police say a woman was shot dead by police and three others died of “medical emergencies”.
Congress reconvened after the violence and has now certified Joe Biden and Kamala Harris’ election win as the next president and vice president of the United States while some Republicans were trying to overturn the results in some states but lack sufficient support.
In a statement, Donald Trump said that while he totally disagreed with the outcome of the election, there would be an orderly transition on January 20th.
Trump called on his violent supporters to go home but repeated false claims the election was stolen.
The president made no reference to the violent protest at the Capitol building, which led to the deaths of four people.
Earlier, Democrats won two Senate seats in Georgia that tipped control of the Senate their way.