Cato Senior Fellow Randy E. Barnett argued on behalf of Angel Raich at the Supreme Court in 2004. It was the last big case at the High Court dealing with broad federal assertions of power under the Commerce Clause. On Friday at the Cato Institute’s new F.A. Hayek Auditorium, Barnett laid out the four words that define ObamaCare’s individual mandate: unprecedented, uncabined, unnecessary, and unconstitutional.

Barnett and I chatted for a bit about whether Antonin Scalia is bound to uphold the Affordable Care Act (ObamaCare) based on his opinion in Raich.

You can watch the full event from Friday here.