Transcript for Trump set to be impeached for historic 2nd time
Here is a live look at the white house where president trump is waking up this morning with just one week until President-Elect Biden's inauguration. This as major security preparations are under way in the nation's capital with rising concerns about the threat of more violence in D.C. And around the country. The house is going to meet Der heavy security today to impeach president trump for a second time. A 76-page report from the Democrats on the house judiciary committee concludes he betrayed his oath, remains a threat to America's national security and democracy and is therefore unfit to remain in office a single day longer. And now, George, for the first time top Republicans are supporting impeachment. The president's under growing pressure to resign before the end of his term. Mary Bruce starts us off with the latest from capitol hill this morning. Good morning, Mary. Reporter: Good morning, Michael. Well, impeachment is now all but certain. Democrats say they have no other option after the vice president overnight refused to invoke the 25th amendment to remove the president from office. Donald Trump is now poised to become the first president in U.S. History to be impeached twice but this time Republicans are now on board too. This morning, Republican support for president trump is crumbling. The number three Republican in the house Liz Cheney announcing she'll vote to impeach. Saying there has never been a greater betrayal by a president of the United States of his office and his oath to the constitution. Blistering and unequivocal Cheney sending a powerful message to her party saying trump summoned this mob, assembled the mob and lit the flame of this attack. Everything that followed was his doing. None of this would have happened without the president. At least five Republicans are now on record saying they will vote to impeach while in the senate trump is losing the support of the Republican leader. ABC news learning that Mitch Mcconnell also believes the president committed impeachable offenses and is pleased the Democrats are moving to remove him. Overnight house Democrats making a last-ditch attempt to pressure vice president Mike pence to invoke the 25th amendment and remove trump from office immediately. It is the political equivalent of shooting somebody on fifth avenue and getting away with it and somebody needs to stand up to that and the 25th amendment is one way to do it. Reporter: The resolution passed but pence rejected the call. In a letter to speaker Pelosi pence writing that it is not in the best interests of our nation or consistent with our constitution adding that the 25th amendment is not a means of punishment and would set a terrible precedent but the vice president notably did not mention the president's actions, neither condemning nor condoning them. Now Pelosi says she has no choice but to impeach. In just hours Democrats are expected to vote an a single article, charging the president with incitement of insurrection but uring his supporters to March on the capitol. In his first public appearance he showed no remorse and took no responsibility. So if you read my speech and many people have done it and I've seen it both in the papers and in the media, on television, it's been analyzed and people thought that what I said was totally appropriate. Reporter: But ABC news has learned that the top Republican in the thought, Kevin Mccarthy, told members that the president admitted to him that he might be, quote, a little bit responsible. Now, as the president stands on the cusp of becoming the first in U.S. History to be impeached twice he has an ominous warning saying yesterday impeachment would cause tremendous anger and, be, quote, very dangerous for the usa especially at this very tender time, robin. Continuing that rhetoric. Okay, Mary, thank you.
This transcript has been automatically generated and may not be 100% accurate.