By LIBBY CATHEY, ADIA ROBINSON and LAUREN KING, ABC News

(WASHINGTON) — President Donald Trump is slated to hand over control of the White House to President-elect Joe Biden in 57 days.

Here is how the transition is unfolding. All times Eastern:

Nov 24, 1:43 pm
Biden introduces nominees for key Cabinet positions

Biden introduced his nominees for key foreign policy and national security positions in his administration at a press conference Tuesday.

“While this team has unmatched experience and accomplishments, they also reflect the idea that we cannot meet these challenges with old thinking and unchanged habits,” Biden said. “For example, we’re going to have the first woman lead the Intelligence community, the first Latino and immigrant to lead the Department of Homeland Security, and a ground-breaking diplomat at the United Nations.”

For secretary of state, Biden nominated Anthony Blinken, one of his “closest and most trusted advisers.”

For secretary of homeland security, Biden nominated Alejandro Mayorkas, a former deputy secretary in the department.

For director of national intelligence, Biden nominated Avril Haines, the former deputy director of the CIA and former deputy national security adviser to President Barack Obama.

For U.S. ambassador to the United Nations, Biden nominated Linda Thomas-Greenfield, a diplomat with 35 years in foreign service.

For his national security adviser, Biden picked Jake Sullivan.

For the first time ever, Biden also announced he will have a presidential envoy on climate, and nominated former Secretary of State John Kerry to the position.

President-elect Joe Biden: "In calls from world leaders…I've been struck by how much they're looking forward to the United States reasserting its historic role as a global leader." https://t.co/RtneOGqkOG pic.twitter.com/KSGn8K9RBK

— ABC News Politics (@ABCPolitics) November 24, 2020

Nov 24, 12:48 pm
Nevada Supreme Court certifies election results

The Nevada Supreme Court certified its election results Tuesday. The next step is for Democratic Gov. Steve Sisolak to sign the certificates of election.

Nov 24, 12:48 pm
Trump lauds stock market gains, dodges questions from reporters

In his first appearance since the transition became official, Trump spoke for just minutes in the White House briefing room about the Dow Jones Industrial Average trading above 30,000.

The president refused to take shouted questions from reporters during the brief news conference. This marks the 21st day in a row that the Trump has refused to take questions from reporters, despite continuing on Twitter to promote baseless conspiracy theories about the election.

Nov 24, 12:37 pm
Biden team moves quickly to begin transition after GSA green light

President-elect Biden’s transition team began reaching out to federal agencies on Monday night, soon after receiving the green light from the GSA and its embattled Administrator Emily Murphy.

Some of the more than 500 Biden staffers and volunteers organized into agency review teams are already in the process of scheduling additional briefings and meetings with counterparts at the Justice Department, Pentagon, Centers for Disease Control, and Department of Health and Human Services, according to a transition official.

Under normal circumstances, those teams would be fanning out across the Washington, D.C., area to meet with officials at each agency and gather in their own office space set aside for presidential transition work. But most of Biden’s operation is expected to continue working remotely, given the pandemic, though exceptions include team members working in the national security space, who will need to access classified information in secure settings.

As for Biden, the president-elect could receive his first presidential daily brief — the sensitive intelligence document seen by only a handful of senior administration officials along with the commander-in-chief — in the coming days.

-ABC News’ Benjamin Siegel

Nov 24, 12:05 pm
Biden campaign attorney lambasts Trump team’s legal effort

After Pennsylvania certified its election results, the lead attorney for the Biden campaign, Bob Bauer, again lambasted the Trump team’s legal efforts.

“It’s readily apparent to everyone besides Donald Trump, Rudy Giuliani, and Jenna Ellis that this election is over and that Joe Biden won resoundingly,” Bauer said in a statement. “Trump did everything he could to disenfranchise voters and stop the results from being certified in Pennsylvania, including filing over 15 unsuccessful lawsuits — most recently producing one of the more embarrassing courtroom performances of all time, with the judge in the case ruling that their arguments were ‘without merit’ and ‘unsupported by evidence.’”

Bauer added that Trump “did not succeed in Pennsylvania and he will not succeed anywhere else.”

Finally, he said that the Trump team’s lawsuits will “continue to fail” and Biden will be sworn in as president on Jan. 20, 2021.

-ABC News’ John Verhovek

Nov 24, 11:17 am
Pennsylvania certifies election results

Pennsylvania announced this morning that the results of the presidential election in the state have been certified.

All 67 of the state’s counties submitted their results late last night, and after certification by state Secretary of State Kathy Boockvar, Gov. Tom Wolf signed the Certificate of Ascertainment for President-elect Biden and Vice President-elect Harris’ electors.

The final vote totals were 50% for Biden and 48.8% for Trump.

-ABC News’ Adam Kelsey

Nov 24, 11:05 am
Michigan AG investigating threats made against members of Wayne County Board of Canvassers

Michigan Attorney General Dana Nessel confirmed Tuesday morning that her office is “actively investigating” threats made against members of the Wayne County Board of Canvassers, according to a statement from her office.

The Criminal Investigations Division opened the investigation “shortly after” the Board of Canvassers meeting last Tuesday, the statement said.

The two Republican members of the board, Monica Palmer and William Hartmann, have both publicly said they have been threatened and harassed since they briefly failed to certify the election results and then later tried to rescind their confirmation votes, though the statement does not name them.

-ABC News’ Olivia Rubin

Nov 24, 10:59 am
Trump continues to refuse to concede more than two weeks after the election

More than two weeks since Biden was projected as the president-elect and a day after the GSA made the transition official, Trump still refuses to concede.

On Tuesday, Trump tweeted that the “GSA has been terrific” but “the GSA does not determine who the next President of the United States will be” after tweeting a  reference to a “big lawsuit” that has yet to be filed.

It follows a separate tweet Monday evening that may be the closest to a concession so far, in which Trump thanked the GSA and its administrator Emily Murphy and said he is “recommending that Emily and her team do what needs to be done with regard to initial protocols, and have told my team to do the same.” Still, he added that his legal battle “continues” and has re-tweeted a litany of baseless claims alleging election fraud.

Notably, in a letter ascertaining Biden as the winner, Murphy cited “recent developments involving legal challenges and certifications of election results” as her reason for considering Biden the apparent winner.

Following her letter, White House Chief of staff Mark Meadows sent a memo to staff Monday evening saying that the White House “will comply with all actions needed to ensure the smooth transfer of power,” per officials who received it.

-ABC News’ Ben Gittleson and Katherine Faulders

Nov 24, 10:11 am
Biden expected to roll out key nominees, Trump to take part in turkey pardon

A day after the GSA recognized Joe Biden as the apparent president-elect after a weeks-long delay — putting in motion the official transition to a Biden administration — President Donald Trump will take part in the traditional presidential Turkey pardon on Tuesday.

Biden and Vice President-elect Kamala Harris, meanwhile, are expected to continue with the rollout that began before the GSA made it official by introducing their nominees and appointees to key national security and foreign policy posts in Wilmington, Delaware, at 1 p.m. ET.

A senior White House official said this year’s turkey pardon event will be smaller than years past due to the pandemic. Social-distancing and mask-wearing will be required, and those in close proximity to the president will be tested beforehand.

This year, the lucky turkeys will be Corn and Cobb.

The lighthearted annual event during which the president spares the lives of a couple of turkeys, however, comes amid the sobering reality that the country has lost about 250,000 people since last Thanksgiving due to the pandemic, as watchers of the president wonder which other pardons might be coming as he serves out his last weeks and as the president continues not to concede the election.

Notably, during his pardoning event in 2018, as Trump pardoned the lucky bird Carrots, he quipped that, “the winner of this vote was decided by a fair and open election conducted on the White House website.”

“This was a fair election,” he said at the time. “Unfortunately, Carrots refused to concede and demanded a recount, and we’re still fighting with Carrots. And I will tell you, we’ve come to a conclusion: Carrots, I’m sorry to tell you, the result did not change.”

-ABC News’ Jordyn Phelps

Nov 23, 8:41 pm
Trump campaign and its allies have lost at least 30 cases since Election Day

Since Election Day, the Trump campaign and its allies have lost least 30 cases brought in an effort to overturn the results of the election, according to an ABC News count. The campaign itself has filed 19 lawsuits across 5 states — 17 of which have been lost so far, either denied, dismissed or withdrawn.

The campaign has won one of its lawsuits. One lawsuit from Nevada has not yet been decided.

That lawsuit asks a Nevada judge to either invalidate the election results in the state and declare Trump’s electors officially elected or to null the election results entirely and prevent either candidate from receiving the state’s six electoral votes. Legal experts told ABC News the strategy has virtually no chance of being taken seriously.

-ABC News’ Matthew Mosk and Olivia Rubin

Nov 23, 6:55 pm
Trump, Biden team respond to GSA saying transition can begin

Donald Trump responded to Joe Biden’s ascertainment on Twitter Monday evening by first thanking his General Services Administration appointee Emily Murphy for her service and, in a direct contraction of her letter, which said there was no political influence behind her decision, took credit for telling Murphy to move forward with the process.
 
“I want to thank Emily Murphy at GSA for her steadfast dedication and loyalty to our Country,” Trump tweeted, adding that his case “STRONGLY continues.” However, Trump hasn’t been able to substantiate any claims of voter fraud — at least 30 lawsuits from Trump and his allies have ended in court losses.

“Nevertheless, in the best interest of our Country, I am recommending that Emily and her team do what needs to be done with regard to initial protocols, and have told my team to do the same,” Trump said in a tweet.
 
Biden transition official Yohannes Abraham also reacted to the news, calling the decision “a needed step to begin tackling the challenges facing our nation, including getting the pandemic under control and our economy back on track.”
 
-ABC News’ Molly Nagle and Jordyn Phelps

Nov 23, 6:20 pm
GSA determines Biden apparent winner of election

ABC News can report that the General Services Administration has informed the Biden camp that he has been determined to be the apparent winner of the election.

The move allows the president-elect’s transition team access to government resources and comes after Biden warned that American lives may be at risk without a formal transition.

Emily Murphy, head of the General Services Administration, a 2017 Trump appointee, sent Biden a letter Monday afternoon telling him his transition could begin. She also defended her position as she’s come under fire from Democrats in recent weeks for delaying the process.

“I have dedicated much of my adult life to public service, and I have always strived to do what is right. Please know that I came to my decision independently, based on the law and available facts. I was never directly or indirectly pressured by any Executive Branch official — including those who work at the White House or GSA — with regard to the substance or timing of my decision,” she said in the letter to Biden.

A transition official for Biden confirmed to ABC News he has received the letter.

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