Who could have imagined that the prime minister, a figure of rectitude, would find himself in such a similar tight spot to his ‘Partygate’ predecessor – accused of misleading the Commons, of losing control of his own government and of being a poor judge of character, asks Sean O’Grady I n shape if not in substance, Keir Starmer’s involvement in the Mandelson affair is beginning to have a bit of a “Partygate” feel to it. You’ll recall the problem with former prime minister Boris Johnson : did he