<p>Mark Carney’s response to the challenges posed by an unreliable US president contains a clarity of vision that is lacking in post-Brexit Britain</p><p>There is no “associate membership” of the European Union, nor any blueprint for what such a thing might involve. It is a political hypothesis, describing a relationship of intimate strategic alignment with the EU, stopping short of actual membership, in ways that are significant but undefined.</p><p>This week, Ursula von der Leyen, the European