Domestic producers still have to compete with each other keeping prices down. But then again you and I have been allover this before. You are a gloBULList and I am a Patriot. A "Protectionist" like every founding father was.
Ok, so the tariff we raised to protect high-paying jobs will be ineffective in raising prices so employers can pay high wages?
Protectionism, at least that kind offered by Hamilton was a tool that was deemed necessary to cut the umbilical cord between Britain and the infant USA.
It was used again after the war of 1812....for similar reasons.
If there were to arise a similar situation after a war was fought, I would probably, out of spite and retribution, be in favor of it.
But without that sort of catalyst, and during a period of enhanced global interdependence and trade, I would conclude that it is highly counterproductive at this time and place.
Having said that you still need to vigorously defend against provable government subsidized dumping that could disrupt domestic industry.
Generally we use a tactic called “name and shame”.
If that does not work, stronger measures can be used. It was this very sort of issue that prompted the last steel tariff against China.
Far as I know it resolved after that.