Abstract
The passage of the Patient Protection and Affordable Care Act in March 2010 represents a significant turning point in the evolution of health care law and policy in the United States. By establishing a legal infrastructure that seeks to achieve universal health insurance coverage in the United States, the ACA targets some of the major impediments to accessing needed health care for millions of Americans and by extension attempts to strengthen the health system to support key determinants of health. Yet, like many newly passed legislative provisions, the ultimate effects and significance of the ACA remain uncertain. Those charged with implementing the ACA face formidable obstacles — indeed, some of the same obstacles that have been erected to impede other major pieces of social legislation in the past — including entrenched political opposition, constitutional challenges, and what will likely be a prolonged struggle over the content and direction of how the law is implemented. As these debates continue, it is nevertheless important to begin to assess the impact that the ACA has already had on health law in the United States and to consider the likely effects that the law will have on public health going forward.