The U.S. Supreme Court justices appeared sharply divided Wednesday over President Barack Obama's controversial healthcare law. The sticking point: tax subsidies.
Attorneys on both sides were grilled by the justices in this latest challenge to the Affordable Care Act.
Some believe a ruling against the administration could mean the beginning of the end for Obamacare. Four words could doom the entire 2,000-page law on a technicality: "Established by the state."