As America gears up for next week's debate between Donald Trump and Kamala Harris, Sarah Dunant looks at the seismic shift in sexual politics in the US since Trump debated with Hillary Clinton.

'Looming, threatening, even the word stalking was used' to describe that encounter, Sarah remembers.

But when this presidential debate gets underway in the early hours of Wednesday morning UK time, Sarah thinks it will be a very different story.

'An encounter worth losing sleep for,' she reckons.

Producer: Adele Armstrong
Sound: Peter Bosher
Production coordinator: Gemma Ashman
Editor: Tom Bigwood