In addition, and most importantly, George W. Bush was a conviction president on foreign policy matters, driven by a clear sense of the national interest. President Bush emphatically made his case to the American people and to the world, explaining why he believed the use of force was necessary, and dozens of countries decided to follow him. In the case of Barack Obama, whose foreign policy has been weak-kneed, confused and strategically incoherent, the president hasn’t effectively made the case for military intervention in Syria, and has made no serious effort to cultivate support both at home and abroad. President...