Exactly. He did not undermine the NATO. The countries in NATO undermined their obligation to pay and maintain their military readiness. It was a joke they wanted to create Europe military organization parallel to NATO couple of years ago. Lat week German highest military person who is about to retire announced that German military is only available for readiness not war and criticizes German government paying not attention to the budget military request for decade. That tells you fact about NATO. Trump was right again. By the way German were the richest European country in NATO.