Expanding Medicaid assistance to a wider range of low-income citizens was a major part of the landmark federal health-care law. But, the Supreme Court last year ruled that states had the right to refuse the expansion.
Under the law, the federal government is required to pay 100 percent of the costs of expanding Medicaid for three years. After that, it will cover 90 percent of the costs of expansion, but Republicans have voiced fears that the funds may be clawed back in the future. Researchers have concluded that by refusing the expansion, states could face big costs for uncompensated care—when the uninsured use emergency rooms, for example.