A new Supreme Court case could strip affordable health care from as many as 10 million people .

At issue in the case King v. Burwell is the Affordable Care Act's health insurance subsidies, which help millions of Americans afford health coverage. If the Supreme Court rules against the government, thereby gutting one of the most fundamental aspects of the law, it'll mean that the federal government can't subsidize health care in states that declined to establish their own marketplaces under Obamacare. That'll make health insurance unaffordable for many of the poorest, sickest Americans .

Here's a map that shows how dire things are. For the 13 states and Washington D.C. that have established their own state-run marketplaces, nothing will change as a result of the ruling. Residents of the 37 remaining states stand to lose their health insurance.

Map by Alissa Scheller.