" it is almost always a mistake for heads of state to undertake the details of a negotiation. They are then obliged to master specifics normally handled by their foreign offices and are deflected onto subjects more appropriate to their subordinates, while being kept from issues only heads of state can resolve. Since no one without a well-developed ego reaches the highest office, compromise is difficult and deadlocks are dangerous. With the domestic positions of the interlocutors so often dependent on at least the semblance of success, negotiations more often concentrate on obscuring differences than they do on dealing with the essence of a problem. "

― Henry Kissinger , Diplomacy