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

ABC News Chief Political Analyst Matthew Dowd said that he thinks Americans are as divided now as they were in the lead up to the Civil War.

"Well to me we're as divided as we were since 1860. I think that's where we are," he told ABC News Live Prime Anchor Linsey Davis. "As a country, because of how we people have lined up and where they are in this country and the level of frustration and anger in some instances and distrust to each side, that we're as divided as we've been in 160 years."

Dowd added that he thought Democrats should be concerned about the results of this election. 

"They're losing in places they used to win, they're not winning by as big margins as they used to do in blue areas," he said. "This is a divided country. They may end up winning the presidency in this instance and keeping the House, but this thing is on a razor edge in who's got the lead in the country today and it's exceedingly close in every election."

Democratic Michigan Sen. Gary Peters will win his Michigan Senate race, ABC News projects.

Peters has held the seat since 2014.

Peters defeated John James, a former Apache combat helicopter pilot in Iraq, who previously ran for the Senate in 2018. During the campaign Peters touted his accomplishments for Michigan and tied James to Trump, while James sought to portray Peters as too liberal for the Rust Belt state.

Attorney Hillary Scholten, the Democrat running in Michigan's 3rd Congressional District to replace retiring Rep. Justin Amash, conceded to Republican candidate Peter Meijer Wednesday.

"We may not have won tonight, but this isn't the end of our fight for a better and bright West Michigan for all," Scholten said in a statement. 

Meijer tweeted that he spoke with Scholten and congratulated her on running a "strong and focused campaign."

"We may differ in approach, but we share common ground in wanting to see West Michigan thrive," he tweeted.

Amash left the Republican Party last year. He also considered running for the Libertarian Party's presidential nomination, but decided against it and ultimately chose to retire from Congress after finishing his current term.

At least 600,000 ballots in Maricopa County, Arizona, are still outstanding, ABC's "Good Morning America" weekend co-anchor Whit Johnson said.

These ballots are absentee ballots that voters brought to the polls in person on Election Day or the weekend before, he said on ABC News Live Prime. 

"We're looking at 600,000, maybe even more outstanding ballots here in the state of Arizona which could potentially swing things," he said. "We have seen Donald Trump getting closer and closer, inching and narrowing that lead that is currently possessed by Joe Biden, but right now the Democrats are confident. They're hanging on."

ABC News has not projected a winner in Arizona.