US Election 2020 Results highlights: Joe Biden to address nation as he widens lead over Donald Trump in Pennsylvania

Facing the potential for narrow losses in multiple battlegrounds, President Donald Trump might have a tough time persuading the Supreme Court to take up his call to intervene and prevent Joe Biden from becoming president.

Trump could need the court's help in two or more states, an unlikely scenario that is far different from what took place in 2000, the only time the court has effectively settled a presidential election. Twenty years ago, the entire fight was over Florida’s electoral votes and involved a recount as opposed to trying to halt the initial counting of ballots.

Trump's campaign and Republicans already are mounting legal challenges in several states, although most are small-scale lawsuits that do not appear to affect many votes.

Twitter on Friday flagged as premature posts referring to Joe Biden as "president-elect," as the vote count continued in the knife-edge US election with the Democrat leading Donald Trump in several key states.

Tweets referring to the former vice president with the victor's title and his running mate Kamala Harris as "vice president-elect" were tagged with messages saying counts were not yet final

"Official sources may not have called the race when this was tweeted," read a message below a post from Democratic Coalition co-founder and podcaster Scott Dworkin using the two titles for Biden and Harris.

The notice came with a link to information about the status of the election. (AFP)

President Donald Trump says he “will never give up fighting for you and our nation” as he is on the cusp of losing his bid for reelection.

He says in a statement released by his campaign: “We believe the American people deserve to have full transparency into all vote counting and election certification.” And he adds that, "This is no longer about any single election. This is about the integrity of our entire election process.”

Joe Biden's lead inPennsylvania, meanwhile, continues to widen. CNN is reporting thatAllegheny County, which is the second largest county inPennsylvania, is still in the process of counting28,000 votes.

Key Republican lawmakers, including 2012 presidential nominee Mitt Romney, on Friday slammed President Donald Trump's unsubstantiated claim that Democrats are trying to “steal” the election, even as GOP leaders struck a more neutral tone — and others urged the White House to fight.

Romney, now a senator from Utah, said Trump was within his rights to request recounts and call for investigations where evidence of irregularities exists.

But Trump “is wrong to say the election was rigged, corrupt and stolen,″ Romney said on Twitter. Trump’s claim ”damages the cause of freedom here and around the world ... and recklessly inflames destructive and dangerous passions,″ Romney said.

State officials say there are about 250,000 votes still to be counted in Arizona, a Western presidential battleground state, where Democrat Joe Biden has a 1.4 percentage point lead over Republican Donald Trump, an advantage of about 43,779 votes.

“The Associated Press continues to watch and analyze vote count results from Arizona as they come in,” said Sally Buzbee, AP’s executive editor. “We will follow the facts in all cases."

The vast majority of the ballots still being counted are from Maricopa County, the most populous area of the state.

The Trump campaign says it is confident the president will overtake Biden when all votes in the state are tallied.

Joe Biden has furthered widened the gap in key battlegroundPennsylvania, where he is now leading by12,497 votes, as per latest batch of ballots.

According to The Guardian, President Donald Trump is likely in the working areas of the West Wing, like the Oval Office right now. He hasn't addressed any press conference or released an official statement since the night-time (ET) press conference.

Lisa Deeley, chair of the Philadelphia City Commissioners said in a press conference that Philadelphia has about 40,000 ballots left to count, which could take several days to complete, CNN has reported.

"Ignore a lot of the noise that's going on, allow us to complete the counting process,"Philadelphia City Commissioner Omar Sabir said.

Biden to address nation Friday evening, says campaign

Joe Biden will deliver an address to the nation Friday evening as he takes the lead in voting in key states needed to win the US presidential election, a campaign official said.

Biden -- who has stopped short of claiming victory but has been called "president-elect" by House Speaker Nancy Pelosi -- will speak later in the day from his home city of Wilmington, Delaware, the official said on condition of anonymity. (AFP)

Joe Biden, who seems to be heading for a victory, will be giving primetime address at night Eastern Time, CNN has reported. His aides believe that he will be giving victory speech then, though that depends on when the race is called.

Things now revolve around certain key battleground states in the US including Georgia, Nevada,Pennsylvania and Arizona (which The Associated Press and Fox News have called for Joe Biden).

Here's an explainer on the battleground states and why they matter.

CNN is reporting that Joe Biden's lead in Nevada has widened further. Biden is 20,000 votes ahead of Donald Trump.

What is interesting with Nevada is that if the state is called for Biden by Associated Press, that helps Biden reach the required 270 mark with the state's six electoral votes. However, other channels have not called Arizona yet, which AP has and which is giving Biden that advantage. In Arizona, much like other states, the contest is turning out to be a nail-biter.