Former secretary of state says the winner of a genuine Democratic primary ‘would have beaten Donald Trump’

Joe Biden’s decision to seek a second term was “a terrible mistake” that cost Democrats the presidency and may have permanently damaged his legacy, Hillary Clinton has declared.

Speaking at the 92nd Street Y in Manhattan on Monday, the former US secretary of state and 2016 Democratic nominee said Biden had reneged on a prior commitment to step aside – and that the betrayal of that promise proved catastrophic. “He made a terrible mistake for himself, his legacy, and for the country,” she said.