TNC covers them:
[I]if you look at a map of which states are refusing the Medicaid expansion, and then look at this report from the Urban Institute, a troubling (if predictable) trend emerges. Approximately a fifth (about 18 percent) of all people who will remain untouched by the Medicaid expansion are black. When you start drilling down to the states where those black people tend to live, it gets worse. In Virginia and North Carolina, 30 percent of those who are going to miss out are black. In South Carolina and Georgia, the number is around 40 percent. In Louisiana and Mississippi, you are talking about 50 percent of those who would be eligible for the expansion but who will go uncovered.
You look at Latinos and get a similar (and to some extent worse) picture.
In a follow-up post, he considers how these facts will impact entire communities:
What the state won’t cover, private citizens must. Those citizens will tend to be black. The people who will have to drain their savings will be black. The people who will take out second mortgages will be black. The people who will pick up second jobs (if they can even get them) and miss parenting time will be black. You can multiply this out across social policy, and see how a wealth gap might be perpetuated.