Do Morals Matter? Presidents & Foreign Policy from FDR to Trump, with Joseph Nye

How much do morals matter for U.S. presidents when it comes to international affairs? What are the ethics of "America First" or 2003 invasion of Iraq? Joseph Nye, former dean of the Harvard Kennedy School, works through each presidency from FDR to Trump and scores their foreign policy on three ethical dimensions of their intentions, the means they used, and the consequences of their decisions.