This week on POTUS 2016, The Mind of Donald Trump. Northwestern University psychologist Professor Dan McAdams explains how a certain combination of personality traits can determine decisions by our Presidents. And in our Evidence-based politics segment, Foreign Affairs editor Gideon Rose deconstructs Trump latest foreign policy speech and U.S./Russian relations in light of comments by the G.O.P candidate about the Ukraine and NATO. Marty Goldensohn hosts.