Remember the Halbig case? If not, catch up right now by re-reading this post from January, written after a D.C. district court judge ruled in Obama’s favor. O-Care is a famously complex law but the lawsuit that could end up demolishing it is surprisingly simple. In a nutshell, there’s a line buried deep in the statutory text that says federal subsidies for insurance premiums will be available to anyone who buys a plan on “an Exchange established by the State.” Question: Does Healthcare.gov, the exchange built by the federal government after 34 states refused to build their own exchanges, qualify...