Biden, in an evening address from Wilmington, Delaware, is announcing his vaccination and economic rescue legislative package.

The ambitious $1.9 trillion proposal focuses on stimulus amid the ongoing pandemic.

Biden's plan would dedicate more than $1 trillion of the $1.9 trillion price tag for direct stimulus, officials said, while $400 billion would go toward COVID-related projects, including the nationwide vaccination program, and $440 billion toward relief for communities and businesses.

The plan includes direct payments of up to $1,400 to families in need, that when combined with the recent $600 stimulus payment would deliver on Biden's pledge to pass $2,000 of direct payments, along with a $400 weekly unemployment insurance benefit through September and a child tax credit.

-ABC News' Molly Nagle

Photos show the beginning of the process to move President Donald Trump out of the White House, as workers load boxes on to trucks.

Biden on Thursday announced his slate for new leadership at the Democratic National Committee, including former South Carolina U.S. Senate candidate Jaime Harrison to be the next chair of the DNC.

Harrison, who lost the 2020 race to GOP Sen. Lindsey Graham last year, despite breaking numerous fundraising records, will officially become DNC chair after the full committee votes on Jan. 21, the day after Biden's inauguration.

Graham congratulated Harrison on the news in a tweet earlier Thursday.

In addition to Harrison, Biden also announced the names of four DNC vice chairs, all of whom were prominent backers of his presidential campaign, including Michigan Gov. Gretchen Whitmer, who served as a campaign co-chair.

Whitmer is joined by Atlanta Mayor Keisha Lance Bottoms, Illinois Sen. Tammy Duckworth and Texas Rep. Filemon Vela as new DNC vice chairs.

House Speaker Nancy Pelosi called Harrison an "inspiring, energizing and influential" in a press release.

"As former Chair of the South Carolina Democratic Party and senatorial candidate, Jaime brings an outstanding track record of success -- from galvanizing the grassroots, mobilizing millions and shattering fundraising records -- that will be critical during this pivotal moment for our Party and Country," she added.

-ABC News' John Verhovek and Beatrice Peterson

During an unscheduled stop on Capitol Hill, Vice President Mike Pence greeted National Guardsmen and telling them that he had just come from a briefing where he heard about their efforts.

He thanked the personnel for "stepping forward for your country" to make the historic transfer of power possible.

"It's been my great honor to serve as your vice president and I want to thank you for your service," Pence said.

The vice president then spoke to individual guardsmen asking them where they are from and how long they served.

About 20,000 National Guard members are expected in Washington this week to protect the city ahead of Biden's inauguration.

"Have a safe inauguration," Pence said.

-ABC News' Elizabeth Thomas and John Parkinson

Not an hour after the House of Representatives voted to impeach Trump for a second time, House Speaker Nancy Pelosi and the House impeachment managers walked across Statuary Hall to the Rayburn Room for a ceremonial engrossment ceremony for the article of impeachment.

The engrossment ceremony is a procedural step that takes the article one step closer to the Senate trial.

"Today in a bipartisan way, the House demonstrated that no one is above the law -- not even the president of the United States -- that Donald Trump is a clear and present danger to our country," Pelosi said, preparing to sign off on the engrossment. "And now, I sadly, with a heart broken over what this means to our country of a president who would incite insurrection will sign the address of the article of impeachment."

Pelosi was joined for the ceremony by the nine House impeachment managers -- one of the rarest assignments for a House member.

Rep. Jamie Raskin, D-Md., a former constitutional law professor who co-authored the article and whose family was present at the Capitol during last Wednesday's riot a day after burying Raskin's son, is serving as the lead impeachment manager. The other managers are Democratic Reps. Diana DeGette of Colorado, David Cicilline or Rhode Island, Joaquin Castro of Texas, Eric Swalwell of California, Ted Lieu of California, Joe Neguse of Colorado and Madeleine Dean, of Pennsylvania. and Del. Stacey Plaskett of the Virgin Islands.

While Pelosi has declined to yet say publicly when the House will send the article over to the Senate, a source involved in the Democratic leadership deliberations told ABC News earlier Wednesday that Pelosi planned to send the article to the Senate next week. Senate Majority Leader Mitch McConnell released a statement after the House voted to impeach Trump indicating the Senate trial should take place after Trump leaves office -- a message to Pelosi to wait to send the article.