Peter explores the Constitution’s most striking and innovative feature: its resilient brand of federalism. The framers created a strong national government while at the same time preserving much of the power and independence of the states. This delicate balance of power, seemingly hard-wired for disagreement and conflict, has served America well for more than two centuries. But it has also led to tensions throughout American history and still sparks controversy today over medical marijuana, gun control, and Obamacare.