Kamala Harris – and Democrats – face an unprecedented task with 100 days to election

Kamala Harris, the vice-president. She has already received endorsements from the president and other key Democratic backers. Illustration: Marcus Peabody/The Guardian/Michael Reynolds/Getty Images

When Joe Biden addressed the NAACP convention in Las Vegas last week, one of his biggest applause lines – a line that set off chants of “Four more years!” – was when he praised Kamala Harris as “not only a great vice-president” but someone who “could be president of the United States”.

Now she has that chance.