Do you know what the United States should do in the Middle East? The answer to that question used to be pretty obvious, but not anymore. For most of the past half-century, U.S. leaders knew who their friends and enemies were and had a fairly clear sense of what they were trying to accomplish. No longer. Today, there is greater uncertainty about U.S. interests in the region, more reason to question the support it gives its traditional partners, and no consensus on how to deal with the dizzying array of actors and forces that are now buffeting the region.