It has often been said that a week is a long time in politics, and never has that been truer than for Bernie Sanders these past seven days.

Before last Saturday’s South Carolina primary, Sanders was a clear frontrunner to become the Democratic presidential nominee. Then came perhaps the great political revival of modern times, in which a previously enfeebled Joe Biden stormed home in South Carolina, and then roared his way to victory in 10 out of 14 states on Super Tuesday last week.

To even his own surprise, Biden now has a comfortable lead in both polling and delegates, who will pick the nominee at the party’s convention in July.

And with every other significant candidate now out of the race, it’s Bernie