Impact of Biden's Debate Performance and Focus on Kamala Harris

Joe Biden has issued a warning to his critics to challenge him at the upcoming Democratic National Convention. Anthony and Miles answer criticism on whether the BBC focus too much on the president’s cognitive abilities.

And with momentum building behind the idea of Kamala Harris taking over from Biden, we answer your questions on why she has been largely absent from the campaign so far.

HOST: Anthony Zurcher, North America Correspondent

GUEST: Miles Taylor, former chief of staff at Department for Homeland Security

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This episode was made by George Dabby with Catherine Fusillo. The technical producer was Jonny Hall. The series producer is Purvee Pattni. The senior news editor is Sam Bonham.