US President Donald Trump marked the onset of the US troop withdrawal from Syria with a new Twitter marking the high points of its aftermath. “Starting the long overdue pullout from Syria while hitting the little remaining ISIS territorial caliphate hard, and from many directions. Will attack again from existing nearby base if it reforms. Will devastate Turkey economically if they hit Kurds. Create 20-mile safe zone.” This is the first time one NATO has threatened another with economic warfare.