A record 90 million Americans have voted early in the US presidential election, data on Saturday showed, as President Donald Trump and his Democratic rival Joe Biden campaigned across the country to try to sway the few remaining undecided voters.

The high number of early voters, about 65 percent of the total turnout in 2016, reflects intense interest in the contest, with three days of campaigning left.

Concerns about exposure to the coronavirus at busy Election Day voting places on Tuesday have also pushed up the numbers of people voting by mail or at early in-person polling sites...