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Obama has earned plaudits for his foreign-policy performance. On his watch, the United States has wound down the wars in Iraq and Afghanistan, and it finally killed Osama bin Laden. In tune with the public mood, he has largely kept America out of costly overseas adventures. But my time in the Obama administration turned out to be a deeply disillusioning experience. The truth is that his administration made it extremely difficult for its own foreign-policy experts to be heard. Both Clinton and Holbrooke, two incredibly dedicated and talented people, had to fight to have their voices count on major foreign-policy initiatives.