What's the Difference Between Commerce and Proper Clause Power?

The book is maybe intended to be a little seductive on this point, because what we want to do by walking you through the events chronologically and the cases chronologically. We show you how these doctrines developed, where they developed, what clauses they were based on. And if you see it developing that way, it just becomes obvious what we're doing to day is x were. You don't have to make a big point about it, because it just seems quite clear.