No, it protects their home markets from competition and allows them to make most of the profits to be made in their home nation and then make even more profits exporting to the US, plus they have the jobs that were lured away from the US with cheap labor and lax regulation.
Have you ever heard of marginal contribution?
Imagine a rich uncle who agrees to support your life long dream of manufacturing and selling widgets. He lends you the money, but you cannot turn a profit. He’s rich and indulges you, so he subsidizes your price to the market by 50%.
1. Who gains?
2. Who loses?