Joe Biden isn’t working. That much has been clear to anyone who has followed American politics for the past four years. The 81-year-old often has no idea what he is saying or where he is. Yet it’s only now, months away from his possible re-election, that the Department of Justice, apparently in an attempt to exonerate him for committing a crime Donald Trump is accused of, has admitted the obvious: he’s not really in charge of himself, let alone the country.