and Keywords US-Turkey relations were built primarily on a security axis in the aftermath of WW II. Af ter a relatively easygoing period in the 1950s, relations suffered from a deficit of trust by the mid-1960s. Radicalization of public opinion in the 1960s and 1970s and the near un conditional support Washington has given to Turkey's frequent military interventions kept a residual anti-Americanism alive. In the post-Cold War period, the Gulf War and the emergence of newly independent countries with ample energy resources in the post-Sovi et space placed Turkey back on the geopolitical map. In the age of "democratization" and the Islamist-Jihadi challenge, Turkey's characteristics as a secular and electoral democra tic Muslim country and a NATO member seeking EU membership made it more valuable for the United States. At the same time, the two sides never adequately dealt with the re ality that their interests diverged considerably after the Cold War. Turkey's refusal to al low the deployment of US troops prior to the invasion of Iraq led to a political downgrad ing of the Turkish military by the Pentagon. After a brief period of close relations under President Obama who called for a "model partnership" between the two allies, as a fall out from the Syrian civil war and the increasing authoritarianism of the Turkish govern ment, relations turned increasingly "transactional" and personalized. Under President Trump the crises that plagued the relations deepened as Ankara and Moscow built closer relations and as bilateral relations increasingly relied on personalistic ties between the two leaders.