Yea it was a bit rush comment from me. I am not an expert in global politics.
America's rather spoiled way of living depends solely on China's manufacturing. And that is completely America's fault. They have used China's cheap labor. Without it, they are in a very sour situation. What am I saying is that America is deepening only on China, but China doesn't depend only on America. China makes stuff for the whole world. America is a big piece of cake, but there is plenty of cake left. Yes, they couldn't just shake it off like a mild cold, but it won't kill them.
TSMC factory is a part of Trump's presidential campaign. It will be there to look good and to make chips for the US army. It probably won't make many consumer chips. Foxconn I think has several factories in the US and they pretty much collect dust. Those factories need to operate with a net loss because labor is so much more expensive in the US.