Turkey and Iran are rivals in the Middle East from every standpoint–political, economic and religious. This does not mean that there will always be unremitting hostility. Tactical shifts are always likely. But Turkey will be unable to tolerate a nuclear-armed Iran unless it also has access to nuclear weapons which it will attempt to buy or if necessary, develop on its own. It has the knowledge and person\el to do so. So Obama’s folly (as well as the rest of the West, don’t forget) will likely result in five nuclear powers in the Middle East: Israel, Iran, Saudi Arabia, Turkey and perhaps Egypt. A geopolitical nightmare. Only regime change in Iran or a devastating military attack (which can only come from Israel or the U.S. after January 2017) will derail the Ayatollah express.