This study will evaluate reform efforts in the following five states where incremental progress in expanding health coverage to adults via Section 1115 demonstration waiver authority has been the primary strategy: Illinois, Maryland, New Jersey, New Mexico, and Oklahoma. The principal objectives of the research are to understand the political and economic context that leads states to enact incremental strategies to cover adults; to determine how these factors affect the sustainability of the initiative; and to estimate the impact of these incremental strategies on three key outcomes of interest. The study will use semi-structured interviews with key informants and administrative data, CPS data and AHA data to examine the success of the programs.