Iraq is a nation in crisis bordering on civil war. The country now faces growing violence, a steady rise in Sunni Islamist extremism, an increasingly authoritarian leader that favors Iraq's Sunnis, and growing ethnic tension between Arabs and Kurds. The recent Iraqi election offers little promise that it can correct the corruption, the weaknesses in its security forces, and the critical failures in governance, economic development, and leadership. The problems Iraq faces in 2014 are a legacy of mistakes made during and after the U.S.-led invasion in 2003, but increasingly the nation is...