Here is how the transition is unfolding. All times Eastern.
Dec 11, 2020, 12:00 PM EST
Biden campaign, DNC devote money and staffers to Georgia Senate runoffs
As the runoff elections for Georgia's two U.S. Senate seats that will decide which party controls the chamber enter their final weeks, Biden's presidential campaign is ramping up its investments to bolster the candidacies of Democrats Jon Ossoff and Rev. Raphael Warnock.
In coordination with the Democratic National Committee (DNC), the Biden campaign has spent roughly $5 million thus far in the Georgia runoffs and are paying for "approximately 50 staffers" to help with organizing, voter outreach and other efforts, according to a Biden campaign official. Around a dozen of the campaign's data analytics staffers are also helping.
The Biden campaign and the DNC also have raised nearly $10 million for both Ossoff and Warnock combined, and earlier this week launched a "Flip Georgia Fund" to aid their campaigns.
Biden himself will travel to Georgia on Tuesday to campaign for Ossoff and Warnock and will emphasize his commitment to helping candidates win up and down the ballot and build a broad coalition that will support his agenda to "build back better," according to a Biden campaign official.
-ABC News' John Verhovek
Dec 11, 2020, 11:23 PM EST
Harris arrives on Capitol Hill to vote
Vice President-elect and California Sen. Kamala Harris arrived on Capitol Hill Friday morning ahead of the Senate’s midnight deadline to pass a one-week continuing resolution on a government funding bill to prevent a shutdown.
“I’m here to vote,” Harris told reporters as she entered the building.
Harris is expected to vote to break the filibuster on the National Defense Authorization Act, an annual military budget bill, which Trump has twice threatened to veto.
Harris was last on the Hill on Nov. 17 to vote against a Trump nominee to the Federal Reserve Board of Governors. -ABC News’ Allison Pecorin
Dec 11, 2020, 10:37 AM EST
Trump plants time bombs for GOP with refusal to admit realities: Analysis
The Trump presidency is now destined to end with falsehoods -- a blizzard of baseless accusations about the election that he lost, as distilled into a final plea to the Supreme Court.
Trump's ask is for the nation's highest court to overturn the results of the election. As unlikely as he is to succeed, that breathtaking statement doesn't even encapsulate the principles at stake that will matter long after Biden is inaugurated.
Some 106 House Republicans -- more than half the GOP conference -- are backing the president's effort to get the Supreme Court to step in. More than that number continue to resist labeling Biden "president-elect," just three days before the Electoral College will cement Biden's victory based on certified results from every state.
So much of the Trump era is ephemeral and transactional. Some Trump loyalists will essentially pretend as if Trump never existed, or that his smashing of conservative principles in service to Trumpism wasn't what it was.
But some of those principles -- of federalism, the rule of law and even basic democracy and common sense -- are still at stake at this moment.
Trump once famously promised to his supporters that they would be "sick and tired of winning" one day. Now, though, what Trump is losing could outlast the limited days of his presidency.
-ABC News' Political Director Rick Klein
Dec 11, 2020, 10:35 AM EST
Overview: Trump pressures SCOTUS to overturn election, Biden to introduce more staffing picks
While Trump waits to hear whether the Supreme Court will take up Texas' case seeking to overturn and invalidate the votes of millions of Americans in four battleground states, he's continuing his pressure campaign on the high court Friday morning, calling on justices to “do what everybody knows has to do be done.”
Experts say justices are unlikely to take up the case, but the Texas lawsuit has quickly become a loyalty test for Republicans with 106 representatives -- about one-fourth of the House or half of the Republican caucus -- asking the high court to disregard millions of votes in a democratic election.
Trump also voiced his resistance Friday morning to turning over distribution of coronavirus vaccines to the incoming Biden administration, tweeting "they want to come in and take over one of the ‘greatest and fastest medical miracles in modern day history'" and slamming the Federal Drug Administration as a "big, old, slow, turtle" moments after Health and Human Services Secretary Alex Azar told ABC's "Good Morning America" that emergency authorization use of Pfizer's coronavirus vaccine is imminent and vaccinations could start as early as Monday. Trump's tweet follows months of him pressuring the agency to speed up its process for approving vaccinations.
Meanwhile, as the Biden White House takes shape, the president-elect is turning to familiar faces in former Obama administration officials to fill top posts and will be introducing some of those picks from Wilmington, Delaware, Friday afternoon.
His latest additions include tapping Dennis McDonough, former President Barack Obama’s chief of staff, as his nominee for secretary of veterans affairs, and naming Susan Rice, Obama’s former national security adviser, as the director of his White House Domestic Policy Council. These picks have some Democrats worried that with the resurgence of so many Obama-era officials there's little room for rising stars in the party.
In another historic first for the Biden team, the president-elect and Vice-President-elect Kamala Harris were named as Time’s 2020 "Person of the Year" -- the first time a vice president has been given the title.