Biden has shown he can beat Sanders. Whether he can now defeat Trump depends on Bernie

Three septuagenarians were vying for the presidency but now there are just two, writes Andrew Buncombe

The pair will need to work together to defeat the president (Getty)

There may very well be a joke in which three men aged in their seventies walk into a bar.

“Which one of you wants to be president,” asks the barman. “I do,” the three septuagenarians reply in unison.

“You can’t all be the president,” says the barman. “We’ll let the people decide.”