Biden to address nation from White House on Thursday

Trump's presidencies will bookend Biden's sole White House term.

The White House announced that he would give an address at 11 a.m. ET.

Biden in a statement on Wednesday said that adding Harris to his 2020 Democratic ticket was the first and "best decision" he made in that campaign.

"Her story represents the best of America's story," Biden said, adding, "I have no doubt she'll continue writing that story."

His statement made no mention of Trump, the former Republican president and now president-elect, who will bookend Biden's sole term in office.

Biden and Harris have both spoken to Trump to offer congratulations to him for winning a second term.

Harris in a speech on Wednesday conceded the race to Trump.

Harris stressed, "While I concede this election, I do not concede the fight that fueled this campaign."

"This is not a time to throw up our hands, this is a time to roll up our sleeves. This is a time to organize, to mobilize and to stay engaged for the sake of freedom and justice and the future that we all know we can build together," she said.

Trump won the swing states of North Carolina, Pennsylvania, Georgia, Wisconsin and Michigan. ABC News has not projected winners for the final two swing states, Nevada and Arizona.

Republicans also took control of the Senate. Results for the House of Representatives are not yet clear.

ABC News' Michelle Stoddart contributed to this report.