“U.S. District Judge Rosemary Collyer last May declared those subsidies illegal because Congress never appropriated money for them. She put her decision on hold to give former President Barack Obama’s administration a chance to appeal, which it did. But now it is the Trump administration that must decide the next move. It could simply drop the appeal, which would mean Collyer’s decision would take effect.
“If the end result of this is that those cost-sharing subsidies go away, this starts to effectively unwind the ACA marketplaces,””