Across Europe, and indeed around the world, America's allies have developed a bunker mentality. They are waiting, hands over their ears, for the assault to end, for peace and quiet to return, for commerce and diplomacy to resume as normal. In a year and a half, or 5½ years in the worst-case scenario, President Donald Trump will go back to his vulgar tower and take his incompetent offspring with him. The world will revert to the status quo ante. America will be led by someone who can read a briefing paper, someone who won't embarrass a head of state when he or she comes to visit, someone who remembers that alliances are the basis of U.