Despite the widespread success of the Affordable Care Act in signing up the uninsured, a few stubborn states that refuse to expand Medicaid house large populations of African Americans.

Wyoming Gov. Matt Mead (R) was once among the handful of state executives to sue the federal government over the Affordable Care Act. Now, he says he wants his state to expand Medicaid under the ACA to cover thousands of low-income residents.

The Affordable Care Act (ACA) Medicaid expansion offers a significant opportunity to increase coverage and improve access to care for individuals experiencing homelessness, who historically have had high uninsured rates and often have multiple, complex physical and mental health needs.

In last spring’s Republican primary, U.S. Senate candidate Thom Tillis ran an ad touting his fight against an expanded Medicaid program. “Thom Tillis has a proven record fighting against Obamacare,” the narrator said. “Tillis stopped Obama’s Medicaid expansion cold. It’s not happening in North Carolina, and it’s because of Thom Tillis.”

States that refuse to accept Obamacare's Medicaid expansion aren't just leaving behind poor residents, they're also hurting hospitals' bottom lines.

Because the Affordable Care Act cut the number of people with no health insurance this year, hospitals across the country will see $5.7 billion less in unpaid bills, according to a report issued by the Department of Health and Human Services Wednesday.

Republican lawmakers in Florida and Texas snubbed the Affordable Care Act's Medicaid expansion for adults, but their states did broaden the program this year — for school-age children.