Where Trump’s ’emergency power’ on foreign business comes from

(CNN)President Donald Trump is threatening to use his broad executive authority in a new and unprecedented way in his escalating trade war with China, arguing he can order companies to start doing business elsewhere. One key thing to know is that the emergency powers he wants to use evolved from the need for the President to act with decisive authority during war, specifically World War I. The Great Depression prompted the expansion of emergency powers to include economic emergencies, according to an analysis by the Congressional Research Service. (This piece uses many facts from that analysis, which is worth reading.) These powers were used throughout the Cold War until the 1970s, when, according to CRS, Congress basically realized the US …