The Supreme Court Monday (June 21) denied insurers’ request that it take up an appeals court decision finding the government can mitigate its obligation to reimburse carriers for Affordable Care Act cost-sharing reduction (CSRs) and sent the suit back to the federal claims court. The denial marks a new phase in the long-running case and will require insurers to prove whether 2018 premium increases -- and the related increase in ACA premium tax credits -- resulted from the government’s action...