Implementing the Affordable Care Act: The Promise and Limits of Health Care Reform.

The Obama administration has confronted a formidable array of obstacles in implementing the Affordable Care Act (ACA). The ACA has overcome those obstacles to substantially expand access to health insurance, though significant problems with its approach have emerged. What does the ACA's performance to date tell us about the possibilities and limits of health care reform in the United States? I identify key challenges in ACA implementation-the inherently disruptive nature of reform, partisan polarization, the limits of "near universal" coverage, complexity, and divided public opinion-and analyze how these issues have shaped its evolution. The article concludes by exploring the political and policy challenges that lie ahead for the ACA.