For and against horizontal vice-presidents. The President is essential, but it's not all. It's understandable for attention to have been riveted on the choice of the next president of the European Commission. By functioning according to the provisions of the Treaty of Nice, the next Commission is risking much, and the first condition for it to be able safely to navigate the dangerous period ahead is for its president to have prestige, authority and an in-depth knowledge of the workings and...