Joe Biden has increased his election majority by flipping the traditionally Republican state of Arizona.
The President-elect is projected to win Arizona after more than a week of vote counting, according to polling company Edison Research.
But sore loser Donald Trump is still refusing to accept defeat and today tweeted another string of baseless claims about voter fraud.
Biden now has 290 Electoral College votes after becoming the second Democratic presidential candidate in seven decades to win Arizona.
He is also winning the popular vote by more than 5.3 million votes, or 3.4 percentage points.
Only a few states are still counting votes, while Trump continues to claim without evidence that the election was marred by widespread fraud.
In order to erase Biden's advantage, Republican Trump would have to overtake the Democrat's lead in at least three of the competitive swing states.
The Trump campaign has filed lawsuits challenging the vote counts in numerous states, although some have already been thrown out by judges.
Legal experts have said the litigation stands little chance of altering the outcome, and state election officials have said they see no evidence of serious irregularities or fraud.
Trump's refusal to accept the result of the November 3 election has stalled the process of transitioning to a new administration.
The federal agency that normally would release funding to an incoming president-elect, the General Services Administration, has not yet recognised Biden as the winner.
His pick for White House chief of staff, Ron Klain, told MSNBC on Thursday that receiving transition funding is important given the US government will roll out a coronavirus vaccination campaign early next year.
"The sooner we can get our transition experts into meetings with the folks who are planning a vaccination campaign, the more seamless the transition to a Biden presidency from a Trump presidency can be," Klain said.
Biden is set to meet with transition advisers again today as he maps out his approach to the pandemic and prepares to name his top appointees, including cabinet members
