This week, Democratic Presidential candidates met for their final debate before the Iowa caucuses, a few weeks after Trump ordered the targeted killing of the Iranian military commander Qassam Suleimani. They talked about how America’s role in the world is threatened by the President’s erratic—and, in the case of Ukraine, likely criminal—approach to foreign policy. But many voters remain skeptical that Trump can be beaten. Susan B. Glasser joins Dorothy Wickenden to discuss the radical uncertainties of the 2020 race.