LONDON – Europe doesn’t figure much in the Democratic primaries any more than it does in the White House. Perhaps it is understandable why France, Germany and Belgium, and to some extent, Britain, are pushing hard for Europe to have its own defense identity. NATO is too dominated by American decision making, so the argument runs, and Europe needs not only the freedom to deal with what it perceives as a crisis without having to win Washington’s support but if it is to be a mature political entity it needs its own military establishment and command and control. Only when it has its own significant military might will America treat Europe with the respect and attention it deserves. Besides without a sense of forward momentum in the European idea the U.S. will have increasing success in its apparent policy of divide and rule. But what exactly would Europe gain? And...