The Washington Roundtable discusses President Donald Trump’s threats to acquire Greenland and his subsequent retreat. At Davos this week, the Canadian Prime Minister, Mark Carney, characterized the episode as “a rupture in the world order.” To analyze how Trump’s rhetoric has heightened concerns about the durability of the transatlantic alliance, the Roundtable is joined by Carl Bildt, the co-chair of the European Council on Foreign Relations and the former Prime Minister of Sweden. “I think what we need to do as Europeans is to do our own thing,” Bildt says. “We now have a United States that, from our point of view, is unpredictable.”