House v. Burwell is far from resolution, but this case’s path through the federal courts and the threat it could pose to the Affordable Care Act show continued vulnerabilities of the health-care law as well as the stakes of the 2016 election.

A Commonwealth Fund report published Thursday looks at a provision in the health-care law that is at issue in the case. To soften the impact of out-of-pocket costs under Obamacare, the law requires insurers to reduce certain payments for individuals whose incomes are up to 250% of the federal poverty level if they purchase a “silver” plan through one of the insurance marketplaces. The law also says that insurers are to be repaid for the discounts.

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