US President Donald Trump has refused to take part in a virtual TV debate with his Democratic rival Joe Biden. The commission organising the debate in Miami on 15 October had earlier said it would have to take place remotely. It made the decision after Mr Trump was treated for Covid-19. The president said he would not waste his time on a move designed to "protect" his rival. Mr Biden's campaign said Mr Trump was trying to evade accountability on his "failures on Covid and the economy". Both teams later appeared to agree on 22 October as a rescheduled date, although the form of the new debate remained unclear. The first presidential debate on 30 September had descended into insults and interruptions. The vice-presidential debate, held on Wednesday night between Mike Pence and Kamala Harris, was a far more measured affair. The US election will be held on 3 November. Latest opinion polls suggest Mr Biden has a high single digit lead nationally, but the outcome is often decided in battleground states where the races can be much closer.