Most countries have VAT's. A VAT is essentially a tariff, when it comes to 2 way trade between countries - ie when Canadians sell to USA they pay no VAT, when we sell to Canada we do. I explained it above.
You can disagree, but most economists agree with me. Although most economists disagree with tariff's also. They don't like Tariff's or VAT's or really any tax - there unproductive. Milton Friedman is famous for railing on taxes, tariff's, VATS and government unproductive spending in general.
Also, in a sound money system a trade deficit would mean your currency would fall, and would help balance trade between two countries. However the US dollar keeps getting stronger even with ever bigger trade deficits. The downside of the reserve currency.
But none of the current moves are really about tariff's. There about too much debt, a shrinking populace and a dieing system.
