The committee investigating last year's attack at the Capitol is working to show how far-right extremists answered Mr Trump's call to come for a big rally in Washington.
The events of 18 December 2020 were a focal point for this latest hearing.
When officials realised the meeting was underway, they interrupted - leading to a"brawl" with screaming, expletives and threats of violence.Early on 19 December, Mr Trump then tweeted about a"big protest" planned for 6 January, where he wrote:"Be there, will be wild!" It would be a"red wedding", said one, a reference to a mass killing in Game Of Thrones."Bring handcuffs."Please use Chrome browser for a more accessible video playerAn anonymous Twitter employee, who gave evidence to the hearing, revealed that he had a sleepless night on 5 January - and was worried people would die the next day when Trump's rally took place.