The way US workers survive in a high-skill economy is having complex, internationally supplied machines/services/trade.
People think what will happen is more stuff made in US, but then that room sized CNC milling machine you ordered from Germany so you can actually operate a US company suddenly has a massive tariff bill and now you have to fire 3 guys to pay the bank for that. And people are buying less of your stuff because they're already spending more money on all their other goods, either because of tariffs or because it's now made by people with less comparative advantage.