How did we get to the meaning of the Commerce Clause we have today?

What does the Constitution mean by “enumerated powers”?  How did this concept apply to the Commerce and the Necessary and Proper Clauses?  Professor Steven Calabresi of the Northwestern Pritzker School of Law gives us an outline for how these clauses have come to be interpreted over time and what the implications are.  Learn more at https://fedsoc.org/no86.