You can demand domestic companies and importers document and attest to domestic standards of living and welfare (health plans, etc). You can tariff items which are made by slave/subpoverty labor. You can subsidize critical industries.
Or, if the concerns are less about "how bad things are there" and more "what about jobs here", we could be spinning up more government jobs programs, more free college, more welfare here so that it doesn't matter if we lose textiles or manufacturing.
>You can tariff items which are made by slave/subpoverty labor
What are 'normal', middle-class wages in developing countries are 'extremely cheap' by US standards. You can't really solve that problem unless you tariff literally everything.
Subsidizing critical industries- sure, I guess. What's the definition of that? Does it include cars? Clothing and shoes? Appliances? Vacuum cleaners? I don't think anyone's disputing that like military goods need to manufactured domestically, but kind of by definition 95% of goods are not 'critical'
Sure you can, that's a matter of foreign policy change or, as someone else pointed out, import tax hikes and export bans (on e.g. chip technology, but also up until a few decades ago, encryption technology)
But you can't outlaw foreign competitors from being cheaper than you, any more than you can pass a law against the tide coming in tomorrow