The D.C. Circuit Court is expected to rule any day now on the Halbig case, and supporters of the Affordable Care Act are growing nervous. In January, an Obamacare advocate described the Halbig case to a reporter for the Hill as "probably the most significant existential threat to the Affordable Care Act. All the other lawsuits that have been filed really don't go to the heart of the ACA, and this one would have." And in a fraught oral argument before the D.C. Circuit Court, the administration seemed to struggle to defend its interpretation. If the ruling goes against the...