Tariffs are not the answer. The answer is to get rid of labor cartels, excessive requlations, taxation, and government control. Tariffs will just increase prices, give labor cartels more power, and trigger a global trade war reducting economic activity world wide.
We are still the number one manufacturer in the world. That's not to say there aren't serious problems but facts are facts.
Free trade is for chumps and losers. China does just fine with tariffs and barriers to entry. So does Japan, Taiwan and Korea. Tariffs have worked out great for America in our past and we can do it again.
Tariffs are a tax, and their effect on an economy has to be seen in light of total taxation. There is a tax rate at which income of government is optimized (Laffer curve peak). Assuming the tax rate to be optimal now (which it may not be, but for sake of argument suppose it is) then one could push tariffs up if in compensation one pushed other taxes down, and end up with no net impact on the economy.
There is something to be said for national self sufficiency helping national security.