No props, no notes, no audience – but Trump-Biden debate will have ad breaks

After chaos in 2020, the switch from non-partisan overseer to commercial TV has some critics fearing a slippery slope

Will you shut up, man?" It was hardly oratory worthy of Abraham Lincoln, but Joe Biden's primal plea in the face of relentless interruptions and heckling from Donald Trump provided a defining soundbite of the 2020 presidential debates.

The two will face each other again on Thursday for the first of two head-to-head debates for the 2024 campaign, under new rules designed to prevent matters degenerating as they did four years ago. The US president and the former president will meet in a TV studio without the presence of a partisan audience, which some saw as an essential ingredient of Trump's rabble-rousing approach. And to counteract the repeated butting-in that so irked Biden, the candidates will have their microphones muted when they are not speaking.