Costly Incrementalism: U.S. PKK Policy and Relations with Türkiye

U.S. policy towards the PKK, a designated Foreign Terror Organization, has varied significantly over four decades, reflecting a clear periodization based on pragmatic policy interests and the interplay of U.S. actions and Turkish responses. Washington has over time supported Turkish counter-PKK actions without direct involvement; actively supported Turkish counter-PKK efforts; tolerated or tacitly supported PKK activities; and directly instrumentalized and supported the PKK in Syria and regionally. Washington's evolving stance toward the PKK coincided with the rise of Al Qaeda (AQ) and its offshoot, the Islamic State in Iraq and Syria (ISIS) as the focus of U.S. Middle East policy. The evolution reflected an incremental approach that subordinated U.S.-Turkish relations and other regional problems to the campaign against AQ/IS. Bilateral cooperation suffered as incrementalism, low trust, and transactionalism came to characterize the relationship. This paper examines the history, current dynamics, and possible future trajectory of U.S. PKK policy as a problem in U.S.-Turkish bilateral relations.