Amid threats from both the spreading coronavirus pandemic and of violence in the wake of insurrection at the Capitol, District of Columbia Mayor Muriel Bowser at a press conference on Monday urged Americans not to attend Biden's presidential inauguration in Washington next week.

Asked if she was scared of what might happen on Jan. 20, Bowser said, "If I'm scared of anything, it's for our democracy. Because we have… factions in our country that are armed and dangerous."

She urged the public to participate in the ceremonies virtually and announced she has asked Trump for a "pre-emergency disaster" declaration similar to the one issued for the first inauguration of former President Barack Obama.

"This is necessary because the inauguration poses several unprecedented challenges that exceed the scope of our traditional planning processes," Bowser said.

Bowser is also asking the Department of Homeland Security to coordinate a federal force deployment plan and extend the inauguration's special event security period, including the cancellation of public gathering permits -- which would require the cooperation of the Interior Department -- through Sunday, Jan. 24. Additionally, Bowser requested daily intelligence briefings from the FBI throughout the security period.

The National Park Service on Monday morning temporarily closed the Washington Monument "in response to credible threats to visitors and park resources" through Jan. 24.

-ABC News' Quinn Owen

During Monday's brief session, Republicans blocked an effort by Democrats to get unanimous consent to force Vice President Mike Pence to invoke the 25th Amendment, and House Democrats introduced one article of impeachment against President Trump for "incitement of insurrection" in the wake of a pro-Trump mob breaching the U.S. Capitol last Wednesday.

The "incitement of insurrection" article of impeachment was introduced by Reps. Jamie Raskin, D-Md., Ted Lieu, D-Calif., and David Cicilline, D-R.I., along with more than 210 Democratic co-sponsors.

The measure says that Trump has "demonstrated that he will remain a threat to national security, democracy and the Constitution if allowed to remain in office and has acted in a manner grossly incompatible with self-governance and the rule of law."

House Speaker Nancy Pelosi has told Democrats they will move forward with an impeachment vote immediately if Pence and the Cabinet do not invoke the 25th Amendment and remove Trump from power.

Hoyer told reporters this morning that "there very well could be" an impeachment vote as early as Wednesday.

-ABC News' Mariam Khan

The House has adjourned moments after gaveling into a pro forma session after Republicans blocked an effort by Democrats to get unanimous consent to force Vice President Mike Pence to invoke the 25th Amendment.

Majority House Leader Steny Hoyer, D-Md., introduced a request by unanimous consent to bring up the Raskin resolution calling on Pence to mobilize the Cabinet to activate the 25th Amendment -- effectively declaring Trump incapable of executing the duties of his office and making Pence the acting president -- but GOP Rep. Alex Mooney of West Virginia objected to the effort.

The House is expected to return on Tuesday for a full floor vote on the legislation. If Pence does not agree to invoke the 25th Amendment, House Democrats says they'll move forward with impeachment.

Monday's session began with the House clerk reading the formal resignation of House Sergeant at Arms Paul Irving and Timothy Blodgett being sworn in as the new Sergeant at Arms.

Calls for the president's removal come after a mob of pro-Trump supporters breached the Capitol on Wednesday while Congress was voting to certify the electoral votes. The assault on the Capitol left at least five dead, including one Capitol Police officer.

-ABC News' Mariam Khan

Drawing a stark contrast to the divisions in the country that boiled over last week, Biden's inauguration theme is set to be of "America United."

After the swearing-in ceremony and inaugural ceremonies at the U.S. Capitol on Jan. 20, the Biden's, Vice President-elect Kamala Harris and her husband Doug Emhoff will be joined by former President Barack Obama and Michelle Obama, former President George W. Bush and Laura Bush, and former President Bill Clinton and Secretary Hillary Clinton for a visit to Arlington National Cemetery. There, the current and former presidents will visit the Tomb of the Unknown Soldier for a wreath-laying ceremony.

The Presidential Inaugural Committee (PIC) announced in a statement Monday, "at a time of unprecedented crisis and deep divisions, America United reflects the beginning of a new national journey that restores the soul of America, brings the country together, and creates a path to a brighter future."

In addition to hosting a National Day of Service -- "United We Serve" -- and the presidential visit to Arlington, the committee will host "Field of Flags" -- a public art display at the National Mall with 191,500 flags representing every state and territory, and 56 pillars of light, in an effort to represent the American people who are unable to travel to Washington for the event.

The committee said in the release the inauguration "will showcase the American people's resilience, heroism, and unified commitment to coming together as a nation to heal and rebuild so that we emerge as the indomitable force that a united America represents."

-ABC News' Beatrice Peterson

Rep. Steve Scalise, R-La. -- the No. 2 Republican in the House -- was the last to speak for the Republican Party, said he opposed the "rushed" impeachment, and emphasized that the Senate will only be able to take up the trial once Trump is out of office.

"I've seen the dark evil of political violence firsthand. And it needs to stop. But all of us need to be unequivocal in calling it out every single time we see it, not just when it comes from the other side of the aisle," he said.

Invoking President Abraham Lincoln, he closed by calling on Americans to unify and "seek higher ground."

House Judiciary Chairman Rep. Jerry Nadler, D-N.Y., quickly responded to his remarks, saying, "We can have all this, and we can have accountability too," before handing off to Majority Leader Rep. Steny Hoyer, D-Md.

Hoyer, in a scathing rebuke of the president, repeated the words of Rep. Liz Cheney and called on his Republicans colleagues to rise to the moment and join her to "reject the vices we abhore."

"It is the first and only physical presence other than the 9/11 attack on this nation -- which came from abroad with a plane aimed at our Capitol dome. This attack was not from abroad. It was as Liz Cheney said, summoned, assembled, and inflamed by the president of the United States of America," he said.

"Last Wednesday, on Jan. 6, the nation and the world watched it shatter to pieces. There could be no mistaking any longer the kind of man sitting in the Oval Office or his intentions and capabilities. The curtain has been pulled back. The office to which he was elected could not temper or reform him," Hoyer said.

"Reject deceit. Reject fear mongering. Reject sedition, tyranny and insurrection," Hoyer said. "Reject one man over fidelity to one's country."

Hoyer noted that soon the House Reading Clerk will call the roll for voting, and added, "Make no mistake, this will be no ordinary roll call."

"These votes will be inscribed on the roll of history -- a record of courage -- and of our commitment to country and Constitution, of our commitment to the rule of law and renewal of that which we inherited and hope to pass on, unbroken, unshattered," he said. "Vote for this -- for America, for our constitution, for democracy, for history."