Election 2020 updates: Biden warns of 'dark winter,' pushes masks in pandemic plan

Biden is now leading Georgia by 1,585 votes. 

Biden has 49.4% (2,450,152 votes) while Trump has 49.4% (2,448,567 votes)

"With a margin that small, there will be a recount in Georgia," Secretary of State Brad Raffensperger said Friday.

There are no automatic recounts in Georgia. A candidate must request a recount and can only do so if the margin between the two candidates is less than 0.5% of the total votes in the race. 

There are about 4,000 outstanding ballots in four counties. Most of the outstanding ballots are in Gwinnett County, near Atlanta.

-ABC News' Quinn Scanlan

Astronaut Mark Kelly is projected to win his Arizona Senate race against incumbent Republican Martha McSally.

Kelly will fill the seat once held by the late Sen. John McCain.

This was Kelly's first run for political office. He is married to former Arizona Rep. Gabby Giffords who became a champion for gun control after she survived an assassination attempt in 2011.

As Biden takes the lead in the key battleground state of Pennsylvania, the Trump campaign issued a defiant statement making it clear that the president is not ready to concede.

"This election is not over," Matt Morgan, the Trump 2020 campaign general counsel, said in a statement Friday.

Morgan blasted what he called the "false projection of Joe Biden as the winner," which he said was "based on results in four states that are far from final."

Morgan also claimed that "Georgia is headed for a recount," alleging -- without evidence -- that "we will find ballots improperly harvested."

Meanwhile, Morgan claimed there were "many irregularities in Pennsylvania," but only provided one example of volunteer legal observers not "having meaningful access to vote counting locations."

Morgan also said "there appear to be thousands of individuals who improperly cast mail ballots" in Nevada -- a baseless claim for which the Trump campaign has provided no evidence.

"Biden is relying on these states for his phony claim on the White House," Morgan said, "but once the election is final, President Trump will be re-elected."

-ABC News' Will Steakin

Biden has pulled ahead in Pennsylvania, overtaking Trump's lead.

As of 8:50 a.m. ET Friday, Biden has 3,295,304 votes in the Keystone State -- 49.4% -- while Trump has 3,289,717 -- 49.3% -- with 95% of the expected vote reporting. That's a difference of 5,587 votes.

There are roughly 135,000 ballots left to be counted, according to the latest data from the Pennsylvania Department of State. State law mandates an automatic recount if the final margin is .5% or less of total votes cast.

Trump flipped the blue state red on his path to the White House in 2016. He won Pennsylvania's 20 Electoral College votes, defeating Hillary Clinton there by 44,292 ballots.

Before that year, Pennsylvania had voted for Democratic presidential candidates in six consecutive elections.

-ABC News' Adam Kelsey