Wolfgang Ischinger, the chairman of the Munich Security Conference and the former German ambassador to the United States, observed that Americans would be highly riled were Brussels to pass legislation to block an oil pipeline from Canada to the United States. Ischinger also pointed to a fundamental lesson of sanctions—they are more likely to succeed when they are multilateral. Unilateral sanctions create rancor among allies. The biggest beneficiary of conflict between the United States and the EU over
