A US Capitol police officer has died from injuries sustained in the attack on Congress by a pro-Trump mob as top Democrats have called for the president to be removed for “inciting” the riot.
House Speaker Nancy Pelosi urged Vice-President Mike Pence to invoke the 25th amendment to the Constitution to declare the president unfit for office.
Alternatively, she vowed to initiate the process to impeach the president.
Under pressure, Donald Trump finally condemned the “heinous attack”.
Wednesday’s violence came hours after Mr Trump encouraged his supporters to fight against the election results as Congress was certifying President-elect Joe Biden’s victory in the November vote.
Five people have died in relation to the riot, including Brian Sicknick, an officer at the US Capitol Police (USCP) who was “injured while physically engaging with protesters”, the police said.
Meanwhile, the top congressional Democrats – Speaker Pelosi and Senate Democratic leader Chuck Schumer – have urged Vice-President Pence and Mr Trump’s cabinet to remove the president for “his incitement of insurrection”.
“The President’s dangerous and seditious acts necessitate his immediate removal from office,” they said in a joint statement.
The duo called for Mr Trump to be ousted using the 25th Amendment, which allows the vice-president to step up if the president is unable to perform his duties owing to a mental or physical illness.
But it would require Mr Pence and at least eight cabinet members to break with Mr Trump and invoke the amendment, something they have so far seemed unlikely to do. Mr Trump is due to leave office on 20 January, when Mr Biden will be sworn in.
If the vice-president failed to act, Mrs Pelosi indicated she would convene the House to launch their second impeachment proceedings against Mr Trump.
However, to succeed in convicting and removing the president, Democrats would need a two-thirds majority in the Senate, and there is no indication they would get those numbers. And it was not clear whether enough time remained to carry out the process.
The New York Times reported, quoting unnamed sources, that Mr Trump had suggested to aides he was considering granting a pardon to himself in the final days of his presidency. The legality of such a move is untested.
What did Trump say?
President Trump returned to Twitter on Thursday following a 12-hour freeze of his account after the social media company said his messages could stoke violence. His message was the closest he has come to a formal acceptance of his defeat after weeks of falsely insisting he actually won the election in a “landslide”.
“Now Congress has certified the results a new administration will be inaugurated on January 20th,” the Republican said in a video, without mentioning Mr Biden by name.
“My focus now turns to ensuring a smooth, orderly and seamless transition of power. This moment calls for healing and reconciliation.”
Mr Trump said he had “immediately deployed” the National Guard to expel the intruders, though some US media reported he had hesitated to send in the troops, leaving his vice-president to give the order.
He also praised his “wonderful supporters” and promised “our incredible journey is only just beginning”.