Regarding tariffs, we wrote the book. Remember Art of the Deal?
However, China wrote 'The Art of War'. Tariffs are supposed to be used only in the event of war. This is already more than Trump understands.

Tariffs generally worked before the Renaissance when country A made wine and country B made grain and they traded. If prices were not fair, they could be equalized. But today few things are made entirely in one country. Even Mexican beer is made with American barley.
It's called a global economy stupid.