I think it's written somewhere in that Constitution thingy.
Foreign Nations have figured out how to use things like Currency manipulation to move their Products into our Marketplace and decimate any competition.
Our Government supports that strategy by punishing Businesses with outrageous Regulations and punishing Taxes.
They are as much to blame as the Countries benefiting from our lopsided Trade Imbalance.
Yes, but as you say, the constitutional thingy is tariffs for revenue not for protectionism.