Foreign policy was always going to be a big part of the 2016 presidential election, as far as the Clinton campaign was concerned. Its candidate spent four years as secretary of state and is running on her record of service. What the Clinton team did not anticipate is that it would be set opposite a Republican who would spend months stoking fear of what's happening outside our borders while proposing the most radical retrenchment of U.S. commitments abroad since before World War II.