Gwinnett County is experiencing a technical issue that is delaying the counting of absentee ballots, county communications director Joe Sorenson told ABC News.

The county had processed the over 118,000 absentee ballots it received that were ready to be pushed through the system to be counted Tuesday night, but "when the time came to push them, the software system (held) a little more than half of the ballots for adjudication," Sorenson said.

Adjudication means the ballots need to be reviewed by a human being and reentered.

According to Gowri Ramachandran, an election security expert at the Brennan Center, ballots are loaded into voting machines in large batches. When the machines determine that one ballot in the batch requires additional human review, it may flag the entire batch of ballots as requiring additional review. Poll workers would then need to go through the batch to determine which ballots needed to be reviewed to determine voter intent. There were 3,200 batches of mail-in ballots that received the error.

The county told ABC News it does not know how many ballots have been affected.

Sorenson said the county is determined to count these ballots overnight.

"We're gonna stay as long as it takes, up to a certain point," Sorenson said.

He said no determination has yet to be made about when to stop trying.

Gwinnett, the second most populated county in the state, is a key former Republican stronghold in the Atlanta suburbs that has been trending Democratic. In 2016, it went for Hillary Clinton by 5.8 points, but it was the first time it voted for the Democratic presidential candidate since 1976, when Georgia native Jimmy Carter won every one of the state's 159 counties. In 2018, Democratic gubernatorial candidate Stacey Abrams won the county again -- and by a bigger margin taking Gwinnett by 14.4 points. 

-ABC News' John Santucci

Trump will win Florida’s 29 electoral votes, ABC News projects, boosting his Electoral College standing to 165 votes, while Biden’s remains at 205.

Florida was considered a must-win state for Trump to keep a viable pathway to reelection.

Pennsylvania state officials had projected wrapping up the count by Friday before the election, but are now not providing an exact timeline.

Philadelphia will continue counting absentee ballots, with the next updates coming overnight and again at 9 a.m.; Allegheny will continue counting around the clock, while at least seven counties have yet to even begin opening and counting mail-in ballots.

-ABC News’ John Santucci, Adam Kelsey, Benjamin Siegel and Alex Hosenball

The Biden campaign has announced that the former vice president will deliver remarks in Wilmington, Delaware, at 12:30 a.m.

With 74% of the nationwide vote in, Biden is projected to have 205 electoral votes to Trump's 136 -- but votes are still coming in all-important battleground states which will ultimately determine the election.

Pennsylvania Gov. Tom Wolf said at a news conference Wednesday morning that election officials "are still at work counting the votes” and added “we may not know the results even today." 

“But the most important thing is that we have accurate results, again, even if that takes a little longer than we’re used to," he added. “I will do everything within my power to ensure that the results are fair and that every vote is counted." 

Pennsylvania’s Secretary of State Kathy Boockvar said the state is approaching 50% of the mail-in ballots being counted, but added "there’s still millions of ballots left to be counted."

Boockvar said the state had somewhere between 2.5 and 3 million mail-in ballots cast this year, or about 10 times the number of mail-in ballots than in the previous presidential election.