More than 300million Americans are nervously awaiting the results of the US Presidential election.
But anything could happen after Trump threatened to fight the result, or falsely claim victory early if he’s in the lead.
And early exit polls suggested the economy was more important to voters than Covid – a possible good sign for Trump.
The next President needs to win 270 of 538 ‘Electoral College’ votes under a system which breaks down support by state.
States award a different number of ‘College’ votes depending on their population – California gets 55 while Delaware gets 3.
Every state except Maine and Nebraska awards all its votes on a ‘winner takes all’ system.
That means if Donald Trump gets 49% and Biden gets 48%, Trump gets all that state’s electoral votes.
More than 100million votes were cast in advance – a record – and long queues formed outside some polling stations.
We will not know the final results on election night, or even this week, because mail-in ballots can still arrive for days.
The first polls closed in parts of Indiana and Kentucky at 11pm UK time on Tuesday, but voting continued for several hours, and some mail-in results can only start being counted on the night.
There were few initial surprises as polls closed, with Donald Trump projected to win Indiana and Kentucky while Joe Biden was projected to win Vermont and Virginia.
Other battleground states including Florida, Georgia and Wisconsin should report the bulk of their results overnight.
That allows US TV networks to project or “call” the results in states where the data suggests a clear winner.
If enough states are ‘called’ for one candidate to get 270 Electoral College votes, that’ll mean they’ve likely won the race.
But other key swing states like Pennsylvania could take days to resolve and be the target for any legal battles. That means if the race is close, the winner might not be known for days or weeks.
Americans are also voting for seats in both houses of Congress.
The entire House of Representatives is up for re-election, as are 35 of the 100 seats in the Senate.
Democrats were narrowly projected to regain control of the Senate, which was previously held 53-47 by Republicans.
We’re monitoring which states and ‘called’ or projected by US TV networks through the night and will update the map above to take them into account.
We’ll also be updating this story with key details about swing states and the races for Congress.
Check back to this page later for more information.