As the 2020 Democrats descend upon New Hampshire, leaving behind the smouldering ruins of an Iowa caucus meltdown sown with confusion, former vice president Joe Biden is returning to a state that has helped end a presidential run of his before — and may very well do so once again.While the results from Iowa have resulted in protests from candidates like Bernie Sanders and even Pete Buttigieg — who remain neck and neck in the still-incoming results there, both with apparent good reason to complain that the slow release of results has blunted their momentum — the same cannot be said for Mr Biden, who finished fourth with no chance at a last minute come-back.