Kamala Harris made her campaign-trail debut as Joe Biden's vice-presidential running mate for the Democrats, criticising president Donald Trump for mismanaging the coronavirus pandemic and making an urgent argument for a Biden administration. Harris, a US senator from California, quickly leapt to the attack on Trump, saying he had endangered Americans by not taking the pandemic seriously, plunging the US into an economic crisis even as it wrestles with racial and social injustice. 'As somebody who has presented my fair share of arguments in court, the case against Donald Trump and Mike Pence is open and shut,' Harris said