US election results 2020: Polling booths open, ballots cast - what's next?

A voter drops off his ballot at an official ballot drop box at the Los Angeles County Registar in Norwalk, California where people are voting in the 2020 US elections.

A woman dressed as Statue of Liberty stands near a polling place on Election Day in Hoboken, New Jersey, U.S.

Caution tape closes off a voting stall to help distance voters to help prevent the spread of the coronavirus during Election Day at the East End School, in Portland, Maine.

People stand in line to vote on Election Day in Atlanta today.

Voters cast their ballots at the old Stone School, used as a polling station, on election day in Hillsboro, Virginia. Polling stations opened in New York, New Jersey and Virginia early Tuesday, marking the start of US Election Day as President Donald Trump seeks to beat forecasts and defeat challenger Joe Biden. The vote is widely seen as a referendum on Trump and his uniquely brash, bruising presidency that Biden urged Americans to end to restore "our democracy."

U.S. first lady Melania Trump leaves after casting her vote during the 2020 presidential election at Morton and Barbara Mandel Recreation Center in Palm Beach, Florida.

U.S. Democratic presidential nominee Joe Biden makes his way through the crowd outside of his childhood home on Election Day in Scranton, Pennsylvania, U.S.

Voters cast ballots at a polling location in Southfield, Michigan, U.S.

Voters fill out and cast their ballots at the Cross Insurance Center polling in Bangor, Maine. After a record-breaking early voting turnout, Americans head to the polls on the last day to cast their vote for incumbent U.S. President Donald Trump or Democratic nominee Joe Biden in the 2020 presidential election.

An election official wearing a protective mask assists a voter at a polling location for the 2020 Presidential election at Madison Square Garden in New York, U.S.

Voters wait at Columbia Manor Golf Club polling place to vote in the 2020 U.S. presidential election in Minneapolis, Minnesota U.S.

Voters wait in line cast their vote on November 3, 2020, in Austin, Texas.

A voter celebrates after she cast her ballot on Election Day, at Frank McCourt High School, on New York's Upper West Side.

A Code Enforcement officer asks to a supporter to stop placing U.S. President Donald Trump and Vice President Mike Pence campaign signs in the limits of a polling station during the 2020 U.S. presidential election in Palm Beach, Florida.

An election official raises her hand to guide voters into the polling place at Eastern High School in Louisville, Kentucky.

A Los Angeles Dodgers fan casts his ballot at the Top of the Park at Dodger Stadium in Los Angeles.

Voters fill out their ballots at the Hale House at the historic Balsams Resort during midnight voting.

Votes are tallied after all five residents voted at the Hale House at the historic Balsams Resort during midnight voting as part of the first ballots cast in the United States Presidential Election in Dixville Notch, New Hampshire.