What you need to know about the first and only vice-presidential debate

It’s been a chaotic few days since Donald Trump was hospitalized after testing positive for coronavirus. But there’s a chance for something approaching an episode of normality in US politics on Wednesday, when the first and only vice-presidential debate takes place. Democratic challenger Kamala Harris and Trump’s vice-president, Mike Pence, will face each other in Utah, where debate organizers have been forced to take extra precautions after…