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

The percentage of expected vote in Pennsylvania has ticked up from 84% to 88%, the percent of mail-in ballots counted has increased from nearly 59% to nearly 71%, and Joe Biden has decreased his deficit with Donald Trump from 320,000 votes to 186,755.

There are roughly 850,000 total outstanding ballots. Of those, 763,311 are mail-in ballots and registered Democrats returned mail-in-ballots by a 3-to-1 margin compared to registered Republicans. Additionally, several of the most-Democratic counties in the state continue to be where the largest number of outstanding votes are located, including Philadelphia and Allegheny counties -- home to the state's two largest cities -- both pivotal to Biden's catch-up effort.

-ABC News' Adam Kelsey

Pennsylvania Secretary of State Kathy Boockvar told ABC News Chief Anchor George Stephanopoulos they are "ahead of schedule" and the state has under 1 million ballots left to count.

"We're actually ahead of schedule of where I thought we'd be," she said. "So I've been saying that I thought the overwhelming majority of ballots would be counted by Friday. I now believe that the overwhelming majority of ballots will be counted by tomorrow."

Boockvar also said that she thought legal action from Trump would not make a difference in the election results.

"What we care about here is making sure that every qualified voter -- that their vote counts, that their voices get heard and we want to make sure no voter is disenfranchised when they're a qualified voter," she said. "So we're going to count every vote and, hey, that's what makes our democracy great."

Before the chaotic protests at a processing facility in Detroit, where poll workers were tallying votes, the Macomb County GOP encouraged supporters on Wednesday morning to stop by the TCF Center in Detroit, urging "all hands on deck!"

"Trained Poll Challengers and or Volunteers willing to be trained needed immediately at TCF Center (Cobo Hall)," the email, which was obtained by ABC News, reads.

The email makes the baseless claim that "questionable" ballots came in at 3 a.m. Wednesday.

ABC News reached out to the Macomb County Republican Party, but has not heard back.

-ABC News' Kendall Karson

According to a Georgia elections official, all of the outstanding vote in Georgia is from Democrat-leaning counties and Biden needs to win 64% of it to overtake Trump.

Right now, Trump has 2,426,104 votes and Biden 2,392,804 votes. 

According to a press release from Secretary of State Brad Raffensperger, as of 10:15 p.m., there are approximately 90,735 ballots still outstanding.

Trump is currently up by 33,300 votes.

-ABC News' Quinn Scanlan