AS SO OFTEN, Theresa May is in trouble. The prime minister is barely in control of her cabinet, let alone her MPs or her party. Unless her attorney-general, Geoffrey Cox, comes back from Brussels with a magical release from the Irish backstop, she is set to lose a second vote on her Brexit deal next week and be forced to seek an extension of the March 29th deadline. The going should be good for the Labour Party. Yet in many ways Jeremy Corbyn, its leader, has even more problems than Mrs May.