The administration's loss in the Hobby Lobby case is a bitter pill to swallow, but it is not a lethal threat to Obamacare. For critics of the law, Halbig is everything that Hobby Lobby is not. Where Hobby Lobby exempts only closely held corporations from a portion of the ACA rules, Halbig could allow an mass exodus from the program. And like all insurance programs, it only works if large numbers are insured so that the risks are widely spread. Halbig could leave Obamacare on life support — and lead to another showdown in the Supreme Court.