Trump impeachment trial live updates: Biden says charge 'not in dispute' in 1st comments on acquittal

As House impeachment managers are continuing to build their case that Trump’s actions and words led directly to rioters' actions on multiple occasions, some senators seemed to be losing interest in the early parts of Thursday's arguments.

However, their attention returned at a few key moments including when House managers played video of rioters yelling "fight for Trump." Most senators also looked up when video of the Charlottesville, Virginia, "Unite the Right" rally in 2017 played in which protesters chanted, "Jews will not replace us."

Republican Sen. Mitt Romney of Utah, who learned for the first time during the trial Wednesday how close he came to the mob until Officer Eugene Goodman steered him away, looked especially thoughtful during a clip played of a rioter saying on Jan. 6, "We were invited here."

Senate Minority Leader Mitch McConnell remained stoic -- as he has throughout this trial -- with his hands folded in his lap, legs crossed. Senate Majority Leader Chuck Schumer sat slumped in his chair as the presentation went on and sat back up as lead impeachment manager Rep. Jamie Raskin, D-Md., finished speaking.

As Raskin finished and Rep. Ted Lieu, D-Calif., began his presentation, several Republicans got up to go into the cloakroom, including Texas Sen. Ted Cruz who challenged the election results in Arizona on Jan. 6.

-ABC News' Trish Turner

House impeachment manager Rep. Ted Lieu played video clips of Republican figures denouncing Trump after the Capitol riot and highlighted the "flood of resignations from people inside President Trump's administration."

"His own officials felt so betrayed by his conduct that numerous officials resigned in protest days before the end of President Trump's term," Lieu said.

"They all took this dramatic action of resigning because they saw the clear link between President Trump's conduct and the violent insurrection," he added.

Rep. Ted Lieu, D-Calif., asserted that Trump failed to show remorse for how his behavior incited the riots. Lieu cited Trump's failure pay his respects to U.S. Capitol Police Officer Brian Sicknick who died during the assault on the Capitol.

"President Trump not only failed to show remorse or take accountability, he made clear he is just beginning. For days, he did not address the nation after this attack. We needed our commander-in-chief to lead, to unite a grieving country, to comfort us. But what did President Trump do?," Lieu said. "Nothing, silence."

Lieu says that enhanced protection around the Capitol is necessary because Trump has not admitted that he lost the election. Lieu argued that his lack of remorse is important as Trump will 'undoubtedly' cause future harm.

"He does not say the one sentence that would stop future political violence, 'the election was not stolen.' He still hasn't said that sentence" Lieu said. "That is why National Guard troops in full body armor still patrol outside."

Lead House impeachment manager Rep. Jamie Raskin suggested the senators do what Thomas Paine told us to do, "use our common sense."

"Trump knew exactly what he was doing in inciting the Jan. 6 mob. Exactly. He had just seen how easily his words and actions inspired violence in Michigan. He sent a clear message to his supporters. He encouraged planning and conspiracy to take over capitol buildings and threaten public officials who refuse to bow down to his political will," Raskin said. "Is there any chance Donald Trump was surprised by the result of his own incitement? Let's do what Thomas Paine told us to do, use our common sense. The sense we have in common -- as citizens. If we don't draw the line here, what's next? What makes you think the nightmare with Donald Trump and lawmaking and violent mob is over?"

"January 6th was not some unexpected, radical break from his normal law-abiding and peaceful disposition. This was his state of mind. This was his essential M.O.," he said.