Helen, the math of the time it takes container ships from China to hit the West coast, the Gulf of Mexico (Houston), and the East coast isn't rocket science. And like they say, if Drumph changes his mind, it still takes months to get containers loaded and delivered from that point.

There are subsidiary markets that will be hugely impacted. I just finished reading Adam Minter's Junkyard Planet: Travels in the Billion-Dollar Trash Trade. Those scrap shipments go back to China on the otherwise empty cargo ships. Metal, plastic, fiber, plastic, all have huge markets in China that will be in disarray as far as prices, available resources, etc. A lot of the material is used in China now for its own infrastructure, but there is still a great deal used in manufacturing that returns to the US.