Formally launching his third presidential campaign, Joe Biden appealed for party and national unity while accusing Donald Trump of leading the US with ‘a clenched fist, a closed hand and a hard heart’. But, he said, ‘we are the United States of America and there is not a single thing we cannot do if we are together’. Biden was a senator representing Delaware for 36 years and vice-president to Barack Obama from 2009 to 2017. He was a relatively late entrant to the sprawling field seeking the Democratic nomination in 2020, with 23 candidates now in the running