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

When he leaves for Alamo, Texas, Tuesday morning, it will be President Trump's first time in public since last Wednesday -- the day his supporters stormed the U.S. Capitol after he encouraged a crowd of thousands, at a rally beforehand, to put pressure on lawmakers affirming Biden's victory in Congress.

Apart from posting video on Twitter last Thursday, before the platform permanently suspended his account, the president has remained behind closed doors at the White House -- spending his final days in office out of the public eye -- but is expected to break his silence with afternoon remarks.

"President Trump is expected to travel to Alamo, Texas, on Tuesday to mark the completion of more than 400 miles of border wall -- a promise made, promise kept -- and his administration's efforts to reform our broken immigration system," White House deputy press secretary Judd Deere told reporters ahead of the visit.

The president is facing renewed calls from congressional Democrats to be removed from office in the wake of last week's riot, with the House poised to pass an impeachment resolution as early as Wednesday charging the president with incitement of insurrection -- and setting Trump up to be the first president in history to be impeached twice.

Trump, for the first time since the assault, spoke with Vice President Mike Pence at the urging of his advisers and allies in an Oval Office meeting Monday that lasted 90 minutes and was friendly in nature, according to White House officials briefed on the meeting. Pence is not expected to invoke the 25th Amendment as House Speaker Nancy Pelosi has called on him to do.

Biden, on Tuesday, will receive the President’s Daily Brief and meet with advisers, while his transition team and allies in Congress begin a push to confirm his national security nominees so they're in place next week, with priority on the confirmation of Department of Homeland Security Secretary-designate Alejandro Mayorkas.

Defense Secretary-designate Gen. Lloyd Austin, nominee for Director of National Intelligence Avril Haines and Secretary of State-designate Tony Blinken will also be part of the push ahead of their hearings on Capitol Hill.

Biden’s nominees may also need now to contend with an impeachment trial in the Senate. Biden suggested in remarks Monday the Senate look into splitting the its time in order to confirm his nominees, pass COVID-19 relief and deal with a presidential impeachment.

-ABC News' John Parkinson, Ben Gittleson and Molly Nagle