The Biden-Harris administration, however, did not comment on the potential announcements.
'Do what needs to be done': US President Donald Trump tells officials to begin transition for next administration
Trump, who lost the November 3rd presidential elections to Biden and Kamala Harris, has yet not conceded.
Michigan House Speaker Lee Chatfield was among seven Republican legislators who met with Trump for about an hour on Friday, amid his longshot efforts to block Biden's win.
In case of a recount, election officials in Georgia will have to re-scan the five million hand-recounted and audited legal ballots.
President-elect Biden leads by more than 81,000 votes in Pennsylvania, a battleground state that has 20 electoral college seats.
The state Bureau of Elections said all of Michigan's 83 counties have sent their certified results to Lansing.
White House Press Secretary did not say when Trump would concede, but said there were "very real claims" of voter fraud without identifying any evidence.
The handover will see all existing tweets on @POTUS, as well as @FLOTUS, @VP and other official accounts, archived.
Declining to criticize Trump, Biden acknowledged Tuesday that he has not been receiving briefings 'that would ordinarily come by now as he opened his virtual meeting withnational security experts.
The president-elect and vice president-elect will meet with business and labour leaders to discuss the economic recovery and building back better in the long term, the transition said.
While caveating that Trump did have outstanding court challenges, O'Brien's comments signaled some of the firmest statements yet from a senior administration official acknowledging Biden's win.
Taking to Twitter to express his agony against the 'rigged elections', Trump said that his opponent won in the eyes of the 'fake media' and that his administration has a 'long way to go'.
A mass brawl broke out on Saturday night just five blocks away from the White House as counterprotesters clashed with a group of Trump supporters.
Why is everyone assuming that Kamala is some sort of wand-wielding, fairy Godmother type who is going to transform the world?
Post election results, can Trump still win with 'fantasy' electors bid? Here's what Republican members say
State GOP lawmakers in Arizona, Michigan, Pennsylvania and Wisconsin have said they would not intervene in the selection of electors, who ultimately cast the votes that secure a candidate's victory.