Biden's win came as voter turnout rose 7% over 2016, resulting in a total of 66% of U.S. adult citizens casting a ballot in the 2020 election, the Washington, D.C.-headquartered center said. Biden's popular vote differential was also better than fellow Democrat Hillary Clinton's 2016 two-point advantage, according to the fact tank.

Donald Trump won Nevada with a majority of the vote and a 3.4-point lead over Kamala Harris. Jacky Rosen was also declared the winner over Sam Brown.

President-elect Trump has defeated Vice President Harris in early Arizona ballot returns, the AP reports. Why it matters: The presidential race has already been called for Trump, but the outcome in battleground Arizona could provide insight as to which party has the upper hand heading into future statewide elections.