RT Journal Article SR Electronic T1 An Engine of Change? The Affordable Care Act and the Shifting Politics of Demonstration Projects JF RSF: The Russell Sage Foundation Journal of the Social Sciences FD Russell Sage Foundation SP 67 OP 84 DO 10.7758/RSF.2020.6.2.03 VO 6 IS 2 A1 Philip Rocco A1 Andrew S. Kelly YR 2020 UL http://www.rsfjournal.org/content/6/2/67.abstract AB The Patient Protection and Affordable Care Act (ACA) made a number of institutional investments intended to expand the federal government’s ability to scale successful demonstration projects into national policy. This article considers how the ACA has reshaped the politics of programmatic innovation in Medicare and Medicaid. A qualitative synthesis of demonstration results suggests that, although the ACA has removed several important veto points to the expansion of successful demonstration projects, numerous barriers to the scaling of reforms remain. These barriers include procedures and techniques that make it difficult to certify the “success” of demonstrations yet make their limitations highly legible. From the analysis, this article draws several lessons for future efforts at delivery-system and payment reform, as well as understandings of policy learning and innovation.