Democrat Joe Biden renewed his attacks on US President Donald Trump's handling of the coronavirus pandemic at Thursday's final debate before the Nov 3 election, while Trump levelled unfounded corruption accusations at Biden and his family.

Trump, a Republican, initially adopted a more restrained tone than he did during their first presidential debate in September, which was quickly derailed by his constant interruptions. But Thursday's clash still featured plenty of personal attacks between two men who evince little respect for each other...