Crazy talk. Just like that weird-fangled 10th whatzit and 2nd whatzit.
The Commerce Clause is absolute!
Today.
We'll see about tomorrow.
Totally, utterly a fraudulent power.
The Constitution specifically says that no state may tax the exports of another state.
Do you smoke? Guess what... your state ignores this provision.
The Constitution means whatever the hell they feel it means at whatever time to serve their purpose, they have basically decided to ignore it.