As well as American auto companies and any other companies that use steel as a component of prouction would be mad too. And then their are the ports and shippers, they wouldn't be all that pleased too. Then there are the end consumers they wouldn't be happy either. But the steel workers would be happy.
American citizens would want them, as they are a constitutional form for funding the government, rather than taxes. But globalists would be unhappy, because transnational companies and foreign governments would be paying a tax that would go to expand the US economy, as opposed to skipping it so they can keep more profits.
That’s the funny thing about “free trade”. As long as it enriches foreign governments, communist dictators and transnational corporations you “free traders” are for it. If it preserves the US domestic economy, leaves our sovereignty alone and gives the US middle class a solid footing, you’re against it.