The House has ended its first round of debate on impeachment and is taking the first procedural vote of the day.

This will likely take roughly 45 minutes to one hour, followed by a second procedural vote on the rule that could take the same amount of time.

After those votes, the House will begin two hours of debate on the impeachment article charging Trump with "incitement of insurrection."

Democrat Rep. James McGovern, the chairman of the House Rules Committee, when closing out the morning debate, said the impeachment vote will show who in Congress stands with the president "no matter what he does" and who stands up to him.

-ABC News' Benjamin Siegel and Mariam Khan

With the first procedural debate wrapped and a second procedural vote on deck, the House of Representatives will soon debate the article of impeachment -- charging the president with "Incitement of insurrection."

At least once during the hearings, lawmakers were reminded by the presiding officer that masks are required on the House floor at all times.

Rep. Sheila Lee Jackson, D-.N.Y., appeared to summarize the heart of Democrats' arguments when speaking ahead of the imminent impeachment vote.

"The president of the United States is an insurrectionist," she said. "He led an insurrection against the United States of America."

"The president provoked these domestic terrorists with words, with actions, with conduct, that portray and have contempt and hostility to the national value of equal justice under the law, telling domestic terrorists -- nearly all of them white supremacists -- many of them who support them politically -- who stormed the Capitol to derail Congress for derailing its constitutional required duty of counting the vote," she said. "He must be impeached because he is a threat."

Rep. Ilhan Omar, D-Minn., a strong critic of Trump's who called to impeach Trump last week while the siege was ongoing, said it's about holding the president accountable, as their oath as lawmakers requires, she said.

"It was a violent attempt to interrupt our democratic process," said Omar, who also called Trump a "tyrant." "We cannot simply move past this or turn the page. For us to be able to survive as a functioning democracy, there has to be accountability."

-ABC News' Benjamin Siegel and Mariam Khan

House Leader Steny Hoyer, D-Md., began by stressing that Trump's action's last week "demand urgent, clear action by the Congress," and praised House Republican Conference Chair Liz Cheney and a handful of Republicans for agreeing with Democrats that Trump ought to be impeached.

"This is the daughter of the former Republican whip and former vice president of the United States of America. She knows of what she speaks, and she said this as well, 'There has never been a greater betrayal by a president of the United States of his office and his oath of Constitution," he said. "This is not, as Liz Cheney said, just some action. She characterized it as the biggest betrayal of any president of the United States in our history."

Hoyer went on to list GOP Rep. John Katko of New York, the ranking Republican on the Homeland Security Committee who Hoyer described as "not some back-bencher on your side of the aisle" and Rep. Adam Kinzinger of Illinois, among the five House Republicans who have publicly stated they'll vote to impeach the president.

"Mr. Kinzinger said this," Hoyer said, "If these actions are not worthy of impeachment, then what is an impeachable offense? There is no doubt in my mind that the president of the United States broke his oath and incited this insurrection."

Hoyer said other Republicans who he has talked to "in the past 24 hours" agree the president's actions are impeachable.

Democrats and Republicans are expected to debate for one hour -- equally divided between Democrats and Republicans -- before a procedural vote ahead of the chamber beginning debate on the impeachment article itself.

Democrat Rep. Jim McGovern, the chairman of the House Rules Committee, setting up that preliminary vote on the terms of the debate, called the Capitol a "crime scene" and the rioters "traitors" and "domestic terrorists" in an assault instigated by Trump, emphasizing, "We wouldn't be here if it weren't for the president of the United States."

McGovern described the day as "a ceremonial role for the Congress -- one that sends a message to the world that democracy persists -- but at a rally a mile and-a-half down Pennsylvania Avenue, Donald Trump was stoking the anger of a violent mob," he began. "He said Vice President Pence has to come through and told the mob to walk down to the Capitol."

"The signal was unmistakable. These thugs should stage a coup so Donald Trump can hang on to power, the people's will be damned. This beacon of democracy became the site of a vicious attack. Rioters chanted, 'Hang Mike Pence,' as a noose and gallows were built. Capitol Police officers were beaten and sprayed with pepper spray. Attackers hunted down lawmakers to hold them hostage or worse," McGovern continued.

"I saw evil, Mr. Speaker. Our country came under attack, not from a foreign nation but from within," he added. He also slammed Republicans for preaching unity from members who voted to overturn a free and fair election.

Republican Rep. Tom Cole -- one of the lawmakers who object to Electoral College results after the violent seige -- called Jan. 6 the "darkest day" of his long career in Washington, but said Democrats, instead of promoting unity, are looking to "divide us further" by pursuing Trump's impeachment.

Cole did not directly defend Trump's actions or rhetoric but argued in Congress, one week before Biden's inauguration, sets up a "flawed process."

The number of National Guard troops deployed around next week's inauguration could rise from at least 10,000 to 15,000, the National Guard’s top general said Monday.

"Support requests from the Secret Service, Capitol Police and Park Police have been authorized to provide up to 15,000 Guard members to meet current and future support requirements," Gen. Daniel Hokanson, the chief of the National Guard Bureau, told reporters on a phone briefing. "They are troops that have been requested to support security, logistics liaison and communication missions."

Hokanson said that there are currently 6,200 Guardsmen in the District, and there would be 10,000 in place by Saturday.

The National Guard has always participated in inaugurations, and there were 9,000 members on hand last year, but because of the coronavirus pandemic, the number had been reduced to 5,000 for 2021. Last week's insurrection at the Capitol changed those plans, and Pentagon spokesperson Jonathan Hoffman additionally made clear that the Guardsmen will be remaining in Washington after Inauguration Day.

"We're not looking at Jan. 20 as the last day and people will pack up and go home at the conclusion of all the events," he said. "There will be some elements that will remain for a brief period to ensure safety and security in the days following the inauguration as well."

Hokanson, the chief of the National Guard Bureau, said no decision has been made yet about whether to arm the Guardsmen but characterized that possibility as an "ongoing discussion."

"Obviously, we're very concerned that we want our individuals to be have the right to self defense," he said.

-ABC News' Luis Martinez