I love the idea of voluntary taxes.
If someone really wants Chinese goods, why not support our government off that?
Tariffs encourage building up local business while penalizing goods from elsewhere.
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Please remember that these are tariffs against A SINGLE COUNTRY...CHINA. Goods currently produced and exported to us from China can be produced in many other countries and exported here. Once companies make the investment needed to (for example) move production to Vietnam. That production will NOT later be moved back to China. This in itself will economically weaken China and IMHO that is a good thing.
You understand, of course, that a manufacturing facility built in Vietnam is almost certainly going to have CHINESE ownership.