In his very long letter to Jeremy Corbyn about why, after all, he will stay out of the Labour party instead of fighting his expulsion, Alastair Campbell complains that Britain has been the victim of a ‘right-wing coup’. Boris Johnson’s government has no ‘real democratic mandate’, he says, and Mr Corbyn should be fighting it much harder. You hear this argument a lot — we have a new prime minister and so we must have a general election. In my lifetime (born 1956), seven prime ministers — Macmillan, Douglas-Home, Callaghan, Major, Brown, May and Johnson — have come into office without a general election before or immediately ensuing; in that sense, without a democratic mandate. In May 1940, Winston Churchill became prime minister and fought the second world war without an election of any kind.