Before introducing his Justice Department picks from Wilmington, Delaware, on Thursday, Biden offered comments on Wednesday's chaos at the Capitol which he deemed "one of the darkest days in the history of our nation" and "an unprecedented assault on our democracy."

"All of us here grieve the loss of life, grieve the desecration of the people's house. But what we witnessed yesterday was not dissent. It was not disorder. It was not protests. It was chaos," Biden said. "They weren't protesters. Don't dare call them protesters. They were a riotous mob, insurrectionists, domestic terrorists."

Biden placed blame on Trump who, he said, for the past four years has "made his contempt for our democracy, our Constitution, the rule of law clear in everything he has done."

"He unleashed an all-out assault on our institutions of our democracy from the outset. And yesterday was but the culmination of that unrelenting attack," Biden said.

Biden also predicted the response would have been very different had the majority of rioters been Black.

"No one can tell me that if it had been a group of Black Lives Matter protesting yesterday, there wouldn't have been -- they would have been treated very, very differently than the mob of thugs that stormed the Capitol. We all know that's true, and it is unacceptable, totally unacceptable," he said.

House Speaker Nancy Pelosi has called on Vice President Mike Pence to invoke the 25th Amendment to remove Trump from office for his "seditious acts" following Wednesday's rioting at the Capitol, she said at a press conference Thursday.

The California Democrat is threatening impeachment proceedings if Pence does not.

-ABC News' Mariam Khan

Senate Majority Leader Mitch McConnell put out a statement Thursday, saying the riots within the Capitol Building Wednesday represent "a massive failure" of "institutions, protocols, and planning that are supposed to protect the first branch of our federal government."

"A painstaking investigation and thorough review must now take place and significant changes must follow," McConnell added. "Initial bipartisan discussions have already begun among committees of oversight and Congressional Leadership."

-ABC News' Allison Pecorin

Transportation Secretary Elaine Chao is resigning from her position in the wake of rioting at the U.S. Capitol.

She cites the storming of the Capitol by "supporters of the President" as an "entirely avoidable event" in a letter she is sending out to her colleagues announcing her resignation.

"Yesterday, our country experienced a traumatic and entirely avoidable event as supporters of the President stormed the Capitol building following a rally he addressed. As I'm sure is the case with many of you, it has deeply troubled me in a way that I simply cannot set aside," Chao said.

Chao is married to Senate Majority Leader Mitch McConnell.

Trump has been quiet Saturday after Twitter announced Friday evening that it had permanently suspended the president's account.

"After close review of recent Tweets from the @realDonaldTrump account and the context around them -- specifically how they are being received and interpreted on and off Twitter -- we have permanently suspended the account due to the risk of further incitement of violence," Twitter wrote in a statement.

Trump's final tweet said he would not be attending Biden's inauguration.

After Twitter's announcement, Politico reported that the president went "ballistic" and “[scrambled] to figure out what his options [were].”

Hours after his suspension, Trump released a statement criticizing the ban and teasing a possible new platform.

"I predicted this would happen," he wrote in part. "We have been negotiating with various other sites, and will have a big announcement soon, while we also look at the possibilities of building out our own platform in the near future. We will not be SILENCED!"

"Twitter is not about FREE SPEECH. They are all about promoting a Radical Left platform where some of the most vicious people in the world are allowed to speak freely," he added.

Trump had attempted to post the same statement on Twitter using the official @POTUS account, but the platform deleted the thread, saying users who are banned cannot post from other accounts.

Secretary of State Mike Pompeo blasted Twitter Saturday, comparing the ban of the president to something that would happen in China.

"Silencing speech is dangerous. It’s un-American. Sadly, this isn’t a new tactic of the Left. They’ve worked to silence opposing voices for years. We cannot let them silence 75M Americans. This isn’t the [Chinese Communist Party,]" he wrote on Twitter.

Former Ambassador to the United Nations Nikki Haley also took to the platform to draw a comparison to China writing, "Silencing people, not to mention the President of the US, is what happens in China not our country. #Unbelievable"

The White House announced Thursday that the president planned to spend the weekend at Camp David before notifying reporters that the trip was canceled. The president has nothing on his schedule Saturday.

-ABC News' Mark Osborne and Conor Finnegan