 BBC News with Govinda Gill. Joe Biden has delivered a faltering performance in the first televised debate with Donald Trump of the US presidential election. At times, Mr Biden struggled to complete his sentences, while Mr Trump made several unverified and unchallenged claims. He refused to say unequivocally that he would accept the result of the vote if he lost. Some Democrats have questioned whether there should now be a last-ditch attempt to replace Mr Biden as the party's candidate.