Joe Biden and Donald Trump faced off in the first election debate of this year's US presidential campaign on Thursday night.   The president was seen to mumble and stumble his way through, while former president Trump repeated false claims that the 2020 election was rigged.   On this episode Niall Paterson unpicks the debate between the senior citizens, with our US correspondent James Matthews in Georgia on the hits and misses, and pollster Scarlett Maguire on how American voters are feeling about the upcoming election.  Producer: Soila Apparicio Editor: Philly Beaumont