Biden fractures foot after fall, will likely be in walking boot 'for several weeks'

After wrapping his teleconference with troops, Trump spoke with reporters. It was the first time he's answered questions since Biden declared victory. 

The president delivered a lengthy list of grievances and unfounded claims of election fraud across the country. 

"It's going to be a very hard thing to concede because we know there was massive fraud," Trump said.

The president provided no direct evidence of fraud while claiming irregularities in Pennsylvania, Michigan and Wisconsin skewed the results in Biden's favor.  He also, again, went after Dominion Voting Systems. 

When asked whether he would announce a run in 2024 if Biden occupies the White House on Jan. 20, the president said, "I don't want to talk about 2024."

Asked if he would leave the White House if Biden is inaugurated, Trump responded, "Certainly, I will. And you know that."

He was also asked whether he would attend Biden's inauguration as tradition dictates.

"I don't want to say that yet. I know the answer, I'll be honest, I know the answer but I just don't want to say it yet," he said.

- ABC News' Liz Alesse

Trump spoke to military troops via video conference on Thursday from the Diplomatic Room of the White House. 

"My profound thanks to each and every one of you for your devoted service to our nation. Our nation is doing very well. It's the highest honor of my life to serve as your commander in chief," he said, reading from a binder.

He veered off his prepared remarks from time to time to pat himself on the back for ensuring the U.S. did not get involved in any wars during his four years in office and ad-libbed some self-congratulatory remarks about the stock market and vaccine development -- saying the vaccine will be delivered to frontline workers starting next week or the week after next.

"You're doing an incredible job and your country is doing well," he said to the service members, which represented the Army, Navy, Marine Corps, Air Force, Space Force and Coast Guard.

The president also took some questions from reporters and said he would "probably" visit Georgia on Saturday to campaign for the Republican senators who face runoff elections. Trump said it would "most likely be at an airport."

Following the event, the White House indicated that the trip to Georgia would likely occur on Dec. 5.

Earlier on Thursday, Trump visited his golf course in Virginia.

-ABC News' Liz Alesse

President-elect Biden and the future first lady Jill Biden spent some time on Thanksgiving virtually talking to front line workers, according to a tweet.

“Jill and I were honored today to talk to some of the heroes on the front lines of this crisis,” Joe Biden wrote. “We’re thankful today and every day for the nurses and firefighters who sacrifice so much to keep our communities safe. We see the very best of America in your courage and selflessness.” 

In a message earlier Thursday, the Bidens said they were celebrating a pared-down Thanksgiving this year and foregoing their traditional large family gathering amid the pandemic.

Georgia’s incumbent senators David Perdue and Kelly Loeffler shared Thanksgiving messages via Twitter Thursday. 

Perdue said he was “especially grateful” for military service members, first responders and health care workers this year. 

“Please join us in praying for them as they serve our state and country,” he wrote. 

Loeffler shared a video reflecting on the tumultuous past year. 

“Though it’s been a year unlike any other we have so much to be grateful for, today and every day, I am thankful for the American dream,” she said. “I was blessed to have the opportunity to live the American dream.” 

“Only in America are these stories possible, and I’m going to continue to fight for that,” she added. 

Perdue and Loeffler are locked in runoffs against Democratic candidates Raphael Warnock and Jon Ossoff that will decide which party controls the Senate.