People will tell you subsidies and positive reinforcement but honestly that is just more government spending to make a few rich. The answer is, there isn't an alternative. All options aren't great.

Manufacturing working conditions are horrible. As a country develops workers rights, unions, safety regulations, etc, it becomes almost impossible to compete on a global scale for manufacturing. Naturally the manufacturers in countries where those things don't exist do very well.

In certain countries, the labor is just a few steps off of slave labor, which we all know is highly profitable and highly unethical. In other countries their dollar is so weak that net exports are the obvious choice for profitable businesses. Manufacturing thrives in these conditions and attracts a great deal of foreign investment - because hey, if the shipping costs are outweighed by the operational savings - it's a sound business plan!!

Tariffs upset that equilibrium and guess who pays American tariffs? AMERICAN COMPANIES. The government gets a benefit, US becomes less likely of an export destination for countries to trade with, the dollar gets messed with in funky ways, and there is some amount of global loss of productivity due to this forced shift.

Basically, I view tariffs as a tax on the benefits of cheap overseas labor.