Washington – The outcome of the US presidential election is on a knife edge, with Donald Trump and his democratic rival Joe Biden neck and neck in key swing states.
Biden said he was “on track” to victory, while Trump claimed a “big win”.
The president is projected to have held the must-win state of Florida – a major boost to his re-election bid.
But Biden is likely to snatch Arizona, a once reliably conservative state. The vote caps a long and bitter race.
Other key states such as Georgia, Pennsylvania, Wisconsin, Michigan and North Carolina are toss-ups.
With the nation on edge, the final result may not be known for days as postal votes are tallied.
More than 100 million people cast their ballots in early voting before election day on Tuesday – setting US on course for its highest turnout in centuries.
Control of Congress is also at stake. As well as the White House, Republicans are vying to hang on to a Senate majority.
Republicans have lost a Senate seat in Colorado, but gained one in Alabama
The House of Representatives is expected to stay in Democratic hands.
