Former US president Donald Trump sat for hours watching the 6 January attack on the US Capitol unfold on live television, ignoring pleas by his children and other close advisers to urge his supporters to stop the violence, witnesses told a congressional hearing.

The House of Representatives Select Committee used its eighth hearing this summer to detail what members said was Mr Trump's refusal to act for the 187 minutes between the end of his inflammatory speech at a rally urging supporters to march on the Capitol, and the release of a video telling them to go home.

"President Trump sat at his dining table and watched the attack on television while his senior-most staff, closest advisors and family members begged him to do what is expected of any American president," said Democratic Representative Elaine Luria.

The panel played videotaped testimony from White House aides and security staff discussing the events of the day.

Former White House counsel Pat Cipollone

Former White House counsel Pat Cipollone was asked question after question in the recorded testimony about Mr Trump's actions: Did he call the secretary of defence? The attorney general? The head of Homeland Security?

Mr Cipollone answered "no" to each query.

"He's got to condemn this s*** ASAP," Mr Trump's eldest son, Don Jr., appealed in a text message to Mr Trump's chief of staff, Mark Meadows. "They will try to f*** his entire legacy on this if it gets worse."

The assault on the Capitol, as Vice President Mike Pence met with politicians led to several deaths, injured more than 140 police officers and delayed certification of Democratic President Joe Biden's victory in the November 2020 election.

Representative Adam Kinzinger, one of two Republicans on the committee, said Mr Trump had no interest in calling off the rioters.

"The mob was accomplishing President Trump's purpose, so of course he didn't intervene," Mr Kinzinger said.

Mr Trump remains popular among Republican voters and continues to flirt with the possibility of running for president again in 2024.

However, a recent Reuters/Ipsos poll suggested that his standing among Republicans has weakened slightly since the hearings began six weeks ago.

Some 40% of Republicans now say he is at least partially to blame for the riot, up from 33% in a poll conducted as the congressional hearings were getting under way.

Donald Trump claims widespread fraud cost him the election

Mr Trump denies wrongdoing and continues to claim falsely that he lost because of widespread fraud.

"These hearings are as fake and illegitimate as Joe Biden - they can't do anything without a teleprompter," Mr Trump's spokesperson Liz Harrington said in a post on his Truth Social social media site during the hearing.

Officers feared for lives

Scheduled during the evening to reach a broad television audience, the hearing was shown on most of the major US television networks.

Another round of hearings will begin in September, said the panel's Republican vice chairperson, Representative Liz Cheney.

Witnesses in the room were Matthew Pottinger, a deputy national security adviser under Mr Trump, and Sarah Matthews, a deputy press secretary in his White House. Both resigned in the hours following the riot.

"If the president had wanted to make a statement and address the American people, he could have been on camera almost immediately," Ms Matthews testified.

"If he had wanted to make an address from the Oval Office, we could have assembled the White House press corps within minutes."

Trump supports stormed the Capitol on 6 January 2021

The panel of seven Democratic and two Republican House members has been investigating the attack for the past year, interviewing more than 1,000 witnesses and amassing tens of thousands of documents.

It has used the hearings to build a case that Mr Trump's efforts to overturn his defeat by Mr Biden in 2020 constitute dereliction of duty and illegal conduct, far beyond normal politics.

Audio testimony from a White House security official whose identity was shielded bolstered previous testimony that administration officials knew there were multiple reports of weapons in the crowd of supporters who gathered for Mr Trump's rally speech.

The committee showed video of several White House officials describing their dismay that afternoon at seeing a Twitter post by Mr Trump to his supporters in which he blamed Mr Pence for not stopping the certification.

Former US Vice President Mike Pence security detail feared for their lives

"Trump was pouring gasoline on the fire," Ms Matthews added.

The security official said some of Mr Pence's bodyguards began to fear for their own lives.

"There were calls to say goodbye to family members," the security official said. "The VP detail thought this was about to get very ugly."

More than 850 people have been charged with taking part in the riot, with more than 325 guilty pleas so far.

Near the end of the hearing, the committee showed outtakes of a video Mr Trump made on 7 January addressing what he called "the heinous attack." But he refused to say in the speech that the election was over.

Mr Trump eventually left Washington on 20 January rather than attend Mr Biden's inauguration that day.

Asked for his assessment of the riot, Mr Cipollone said in the testimony shown that it could not be justified in any way.

"It was wrong and it was tragic and it was a terrible day for this country," he said.