The highly anticipated case challenging ObamaCare's subsidies will officially reach the Supreme Court on March 4. Justices will hear arguments in King v. Burwell in just under three months, according to the court's schedule posted Monday afternoon. The case, led by conservative groups, questions whether the federal government can legally hand out healthcare subsidies in 34 states that have opted out of creating their own exchanges. The plaintiffs of the case also released their opening brief on Monday, a 129-page document that lays out their case against the subsidies.