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

Sources tell ABC News that Trump's top campaign advisers are huddled at the campaign offices outside of Washington, D.C., Wednesday afternoon plotting a path forward. Among the campaign advisers there are White House Chief of Staff Mark Meadows and Senior Advisor Jared Kushner.

Sources say the teams have spent the day in meetings and conducting calls with staff.  

As of now, it is unclear if Trump will make any public appearance Wednesday.

-ABC News' John Satucci and Katherine Faulders

As the count continues across the country, top Department of Homeland Security officials are urging patience and vigilance.

Chris Krebs, the director of the Cybersecurity and Infrastructure Agency (CISA) tweeted a photo of his socks that say, "#TrustedInfo2020."

“Patience is the name of the game and look to your state and local election officials for updates,” he said.

Tuesday night, a senior CISA official said that the environment is ripe for foreign actors to spread disinformation and urged Americans to be on the lookout. The FBI and DHS issued guidance in September.

-ABC News' Luke Barr

Arizona Secretary of State Katie Hobbs appeared on a local Fox new station Wednesday to debunk concerns that ballots were being invalidated because permanent markers, such as Sharpies, were used to fill them out. 

Her response came after Matt Schlapp tweeted that voters in GOP precincts were given Sharpies at the polling place, causing ballots to be invalidated. 

Hobbs assured that those ballots filled out with Sharpies at the polls "are being counted." 

"I can assure voters that nobody in a polling place -- a trained employed polling place worker -- is not going to give you a pen to mark your ballot that is going to invalidate your ballot. They knew what they were doing and those ballots are being counted," Hobbs said. 

Hobbs also said that people who filled out their ballots at home using a Sharpie can also feel confident their vote will count.

"We have ways to address ballots that have stray marks or things that are going to interfere with the tabulator being able to read them," Hobbs said. "There are adjudication boards that are looking at some of these ballots right now to determine the intent of the voter and make sure that their votes are able to be counted."

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Biden, Trump race undecided as states count ballotsThe decisions for the 2020 presidential race are still outstanding in the key battleground states of Michigan, Georgia, Wisconsin, Arizona and Pennsylvania.

ABCNews.com

Additionally, the Maricopa County Elections Department posted a video to Twitter Tuesday clarifying to voters that the use of Sharpies was approved in the county.

According to the video, "Sharpies are safe to use." 

Bleed-through from a Sharpie is not an issue because the columns on the ballot are offset from one another, the video explains. 

"It's the fastest drying ink and works best on the tabulation equipment," the video says.

--ABC News' Allison Pecorin

Following a tight Senate race, Sara Gideon, a Democrat and speaker of the Maine House, has conceded to longtime Maine Sen. Susan Collins.

Gideon said Wednesday that she spoke with Collins and congratulated her.

"I told her that I will always be available to help serve the people with me," Gideon said.

"Regardless of the result, together, we built a movement that will help us make progress for years to come," she added.

At an outdoor COVID-19 compliant party Tuesday night, Collins touted her history of never missing a vote in the Senate, more than 7,400 votes over 24 years.