“The Patient Protection and Affordable Care Act (PPACA) is designed to extend health-insurance coverage to tens of millions of uninsured Americans. Rarely is it mentioned, however, that Medicaid, the government-run health-insurance program for the poor, will provide more than half of that new coverage under the law. The PPACA assigns Medicaid this central role, despite long-standing concerns about Medicaid’s costs and the quality of its care.”