Yesterday was the second of three days of hearings in the Supreme Court’s review of Obama’s Affordable Care Act. The session was devoted to one key question: Is Congress overstepping its Constitutional power by requiring nearly all Americans to carry health insurance? Jeffrey Rosen is back to break it all down for us, and to give us a preview of what will happen in today’s third and final day of hearings. Rosen is professor of law at George Washington University, and he’s been following the arguments closely. He joins us from Washington, D.C.