More from Zeihan:
Turkey and the United States have been pulling apart for three decades. In a world where Soviet containment is the end-all be-all, the alliance was everything. Remove the Soviet threat, however, and the Turks have interests in the Balkans, Caucasus, Persia, Mesopotamia and the Levant that have next to nothing to do with American interests. Turkey is reasserting itself as a major regional power, and since the American military position in places like northern Iraq and Syria are largely dependent upon supply routes through Turkey, there is no long-term American strategic position in these regions without express Turkish assistance. That assistance has been removed, so the Americans – regardless of domestic policy preferences – have no choice but to leave.