People who see the world through the lens of domestic politics label ObamaCare as Barack Obama’s signature achievement. They are wrong. Obama has had a much greater, and more ominous achievement in the geopolitical arena. What did Obama really have in mind when he told Medvedev that after his re-election he would have greater flexibility? As he assumed office, the world was uni-polar and the US was the sole superpower. Five years into his Presidency, Iraq is reverting to sectarian warfare and becoming an Iranian client state. Afghanistan is slipping away as fast as American troops are leaving. Egypt was...