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

Pennsylvania Lt. Gov. John Fetterman said he expects Biden to take the lead in his state soon, as ballots continue to be counted.

Trump currently holds an edge of about 16,000-18,000 votes, and there are "north of" 150,000-160,000 ballots left to be counted in the Keystone State, according to Fetterman, who noted that Pennsylvania's Republican-controlled state legislature did not allow local election officials to pre-canvas mail-in ballots before Election Day.

"Counting is ongoing and updates are going to be coming in, and I would expect the president's margin to evaporate shortly and go into the positive category for Vice President Biden," Fetterman told ABC News chief anchor George Stephanopoulos in an interview Friday on "Good Morning America."

Fetterman, a Democrat, called Trump's evidence-free claims of election fraud in Pennsylvania "lies" and "blatantly untrue." He said the election has run "smoothly" in his state and that the only evidence of fraud so far was a registered Republican in Luzerne County who tried to vote for his dead mother and has since been charged with voter fraud.

"The math that currently remains in front of us doesn't bode well for the president, and the closer it gets I think you're going to see more and more of that kind of incendiary misinformation," Fetterman said.

Gabriel Sterling, who oversees the statewide voting system in Georgia, said election officials are still counting thousands of legal votes and they haven't seen any evidence of widespread irregularities.

"We've had reports of specific things, we sent investigators out looking for specific evidence and, the reality behind those, we always get those in every election -- it's a normal thing. We have not seen anything so widespread that it could potentially effect the outcomes," Sterling told ABC News chief anchor George Stephanopoulos in an interview Friday on "Good Morning America."

"The counties are being diligent, they are working hard, they are all exhausted. But we feel like they're doing a good job and treating everybody fairly," he added. "Our goal is to count and report every single legal vote."

Sterling said they expected vote counting to take days due to the nature of this election -- a surge in absentee ballots amid the coronavirus pandemic. There are 8,197 absentee ballots left to be counted across Georgia, as well as 8,899 military and overseas ballots that are still available to come in Friday, according to Sterling.

Biden currently leads Georgia by 1,096 votes, after overtaking Trump's edge in the Republican stronghold early Friday morning.

"When we know the outcome of this election, we're going to have an audit afterwards and we have a very good likelihood that its going to be within a half of a percentage," Sterling said. "Under our laws, whoever comes in second in this election [in Georgia], they can request a recount."

Biden's lead in Arizona increased by 795 votes overnight, as the longtime Republican stronghold edges toward flipping blue.

As of 4:50 a.m. Friday, Biden has 1,532,062 votes -- 50.1% -- while Trump has 1,485,010 votes -- 48.5% -- with 90% of the expected vote reporting statewide. That's a difference of 47,052 votes.

About 263,000 ballots are left to be counted in the Grand Canyon State, where 11 Electoral College votes are up for grabs.

Republican candidates have won Arizona in every presidential election but one since 1952. Bill Clinton flipped the red state blue in 1996.

-ABC News' Kendall Karson and Chad Murray

Biden has overtaken Trump's lead in Georgia by 917 votes.

As of 4:50 a.m. Friday, Biden has 2,449,371 votes while Trump has 2,448,454 -- 49.4% each -- with 99% of the expected vote reporting.

About 10,000 ballots are still left to be counted in the Deep South State, where 16 Electoral College votes are up for grabs.

Voters in Georgia, once a reliable Republican stronghold, haven't swung for a Democratic presidential candidate since Bill Clinton in 1992.

-ABC News' Chad Murray and Quinn Scanlan