WASHINGTON (AP) — President Donald Trump is on the verge of being impeached for a second time in an unprecedented House vote Wednesday, a week after a mob of loyalists stormed the U.S. Capitol in a deadly siege.

“We are debating this historic measure at a crime scene,” said Rep. Jim McGovern, D-Mass.

“This was not a protest this was an insurrection,” he said. He called the rioters “traitors” and “domestic terrorists” and said “they we acting under the order of Donald Trump.”

Security at the Capitol was tight, beefed up by armed National Guard troops, with secure perimeters set up around the Capitol complex, congressional offices and other buildings.

While Trump’s first impeachment in 2019 brought no Republican votes in the House, a small but significant number of leaders and lawmakers are breaking with the party to join Democrats, saying Trump violated his oath to protect and defend U.S. democracy.

The stunning collapse of Trump’s final days in office, against alarming warnings of more violence ahead by his followers, leaves the nation at an uneasy and unfamiliar juncture before Democrat Joe Biden is inaugurated Jan. 20.

Trump, who would become the only U.S. president twice impeached, faces a single charge of “incitement of insurrection.”

Republican Rep. Tom Cole of Oklahoma rejected the rush to impeach, saying the country “desperately needs a path forward of healing.”

Trump took no responsibility for the riot, suggesting it was the drive to oust him rather than his actions around the bloody riot that was dividing the country.

“To continue on this path, I think it’s causing tremendous danger to our country, and it’s causing tremendous anger,” Trump said Tuesday, his first remarks to reporters since last week’s violence.

A Capitol police officer died from injuries suffered in the riot, and police shot and killed a woman during the siege. Three other people died in what authorities said were medical emergencies. Lawmakers had to scramble for safety and hide as rioters took control of the Capitol and delayed by hours the last step in finalizing Biden’s victory.

At least five Republican lawmakers, including third-ranking House GOP leader Liz Cheney of Wyoming, were unswayed by the president’s logic. The Republicans announced they would vote to impeach Trump, cleaving the Republican leadership, and the party itself.

“The President of the United States summoned this mob, assembled the mob, and lit the flame of this attack,” said Cheney in a statement. “There has never been a greater betrayal by a President of the United States of his office and his oath to the Constitution.”

Unlike a year ago, Trump faces impeachment as a weakened leader, having lost his own reelection as well as the Senate Republican majority.

Senate Republican leader Mitch McConnell of Kentucky is said to be angry at Trump, and it’s unclear how a Senate impeachment trial would play out. The New York Times reported that McConnell thinks Trump committed an impeachable offense and is glad Democrats are moving against him. Citing unidentified people familiar with McConnell’s thinking, the Times reported McConnell believes moving against Trump will help the GOP forge a future independent of the president.

In the House, Republican leader Kevin McCarthy of California, a top Trump ally, scrambled to suggest a lighter censure instead, but that option crumbled.

So far, Republican Reps. John Katko of New York, a former federal prosecutor; Adam Kinzinger of Illinois, an Air Force veteran; Fred Upton of Michigan; and Jaime Herrera Beutler of Washington state announced they, too, would join Cheney to vote to impeach.

The House tried first to push Vice President Mike Pence and the Cabinet to intervene, passing a resolution Tuesday night calling on them to invoke the 25th Amendment to the Constitution to remove Trump from office. The resolution urged Pence to “declare what is obvious to a horrified Nation: That the President is unable to successfully discharge the duties and powers of his office.”

Pence made it clear he would not do so, saying in a letter to House Speaker Nancy Pelosi, that it was “time to unite our country as we prepare to inaugurate President-elect Joe Biden.”

Debate over the resolution was intense after lawmakers returned the Capitol for the first time since the siege.

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