There's growing calls from prospective voters for Joe Biden to step down from the ongoing presidential race.

Biden has stayed adamant that he's not dropping out, and he's told campaign staff he's in to the end.

American pollster Henry Olsen says public support for Biden is decreasing fast.

"Because of the electoral college balance towards Trump, Biden has to win by 2 points or more to have any chance of winning the electoral college. Being down by 6 when he's this well known and Trump is this well-known, this late in the campaign - it's fatal."

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