With the Supreme Court’s decision to review the constitutionality of Obamacare’s individual mandate, that feature of Obamacare has been getting a lot of attention. The individual mandate is the requirement that essentially every American buy government-approved health insurance under penalty of law. The Obama administration claims that because Congress is empowered to regulate interstate commerce, it is also empowered to compel interstate (or, more often, intrastate) commerce — which is a rather novel interpretation of the Constitution. Moreover, the news from the Court comes hot on the heels of the passage of an anti-individual-mandate measure in Ohio. The measure was...