Last night, all eyes were on the presidential debate set in Nashville, Tennessee, the home of country music. (Subscribe: https://bit.ly/C4_News_Subscribe)

Any viewers expecting a shoot-out between Donald Trump and Joe Biden may have been disappointed, or relieved, thanks to the intervention of the mute button - or the fear of it.

Both candidates were saved from their own worst excesses, as seen in their first gladiatorial clash last month.

But did the Nashville debate change any minds in the trench warfare of this campaign, in which 52 million Americans have already voted?

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