Obamacare and subsidies

From The Washington Post:

The Supreme Court on March 4 will hear the case of King v. Burwell, which threatens to unravel the Affordable Care Act, a.k.a. Obamacare, because the plaintiffs argue that the health-care law does not authorize subsidies through federally run insurance marketplaces; instead, they say, the law only allows such subsidies in the 14 states (and District of Columbia) which set up their own exchanges. The subsidies, which come in the form of a tax credit, reduce the cost of premiums by as much as 89 percent. A court ruling denying subsidies to states on the federal exchange will cause the law to collapse, many experts say.