US President Donald Trump and his Democratic White House challenger Joe Biden have held duelling rallies in the critical election state of Florida.

Mr Biden told supporters: "You hold a power. If Florida goes blue [Democratic], it's over."

Celebrating soaring economic figures, Mr Trump, a a Republican, said of his rival: "He's going to lock you down."

With just five days to go until election day, Mr Biden has solid lead nationally in opinion polls.

But his advantage looks less assured in the battleground states, such as Florida, that will decide who ultimately wins White House.