Most constitutional law professors will admit that the Commerce Clause — which gives Congress the power to regulate interstate commerce — isn’t exactly the sexiest part of their syllabus.

That dry subject matter has been spiced up this year by the legal fight over the Patient Protection and Affordable Care Act, which implicates a host of interesting constitutional issues including the Commerce Clause, states’ rights and the government’s authority to tax and spend. The U.S. Supreme Court is hearing oral arguments about the reforms this week.