The U.S. Security Coordinator (USSC) mission in Jerusalem was created in 2005 to help implement security sector reform within the Palestinian Authority (PA). With a single-minded focus on “counterterrorism,” Washington considered the USSC an ancillary mechanism to support U.S. diplomatic and political efforts to resolve the Israeli-Palestinian conflict. Despite upending long-standing U.S. policy and cutting all other forms of aid to the Palestinians, the Trump administration has maintained the USSC in the run-up to the “Deal of the Century.” This article draws on original interviews with security personnel responsible for enacting USSC interventions. It uses their insights to highlight how the mission tethered Israeli political aims to its remit, and the distorting ramifications that have ensued for Palestine and the Palestinians. In uncovering the full parameters of Washington's securitization policy, this history also points to the ways in which the PA has consequently been woven into the U.S.-led “global War on Terror.”