Donald Trump can have some advantage in negotiations. NAFTA is high on his agenda.But if he goes too far, I think the president of Mexico Enrique Pena and the Mexicans will decide they would just as soon get out of NAFTA, and we don't want that either. There may need to be some changes, but to re-imagine the entire world we have had an international order. It's not perfect, but for 70 years, it has kept Europe whole and free and safe, and we need to keep it in place.