For several years in the early 1990s Deng Xiaoping ran China despite having no formal title other than Most Honorary President of the Chinese Bridge Association. The European Union today is roughly the opposite: a place crawling with presidents, yet nobody in charge. An unexpected power vacuum has befallen the continent in the midst of ongoing war, a budding trade spat with China and a nerve-jangling election in America. Whether in Brussels or in national capitals, those on hand are otherwise engaged, usually with their own domestic difficulties. Can someone—anyone—step up to lead Europe?