As Joe Biden took to the stage in Wilmington, Delaware, on Saturday night promising a new beginning for America, it was easy to forget that his victory was not preordained.
Nine months ago, the day of the Democratic Nevada caucuses, I went into a small, electrical workers union building on the outskirts of Las Vegas to hear from the former vice-president. Biden had already lost badly in the Iowa caucus and New Hampshire primary. While he performed better in Nevada, many were writing off his candidacy.