Joe Biden warned any country that interferes in the US election "will pay a price" if he is elected.
Democratic White House challenger Joe Biden warned in his final debate with Donald Trump on Thursday any country that interferes in the US election "will pay a price" if he is elected.
"I made it clear that any country, no matter who it is, if it interferes with American elections will pay a price. They will pay a price," Biden said.
A day before the debate, US authorities had warned that Russia and Iran took steps to influence public opinion ahead of the November 3 vote.
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