The Halbig case, which will be decided by the Supreme Court this summer, would eliminate all federal subsidies for ObamaCare premiums bought on the federal exchange if it goes the way of the plaintiffs. Conservatives have been licking their chops at this possibility because, without those subsidies, the whole ObamaCare fiscal scheme essentially collapses. There would seemingly be no way at that point that President Obama can just sit there and refuse any changes to the law.