If all products from China and elsewhere were banned, prices for these products would rise very significantly, quite possibly doubling or more.
Which would be, of course, the equivalent of having your income cut by 50%. Is that something you are personally willing to face up to for the good of your country, or do you just like to flame American companies that follow the financial incentives we as a nation have set up in the tradition of the free market?
IOW, if a 100% American businessman started up a competitor to Walmart across the street selling only American products, but in which the products were on average 2x the price, would you shop there? If you would, how many other Americans do you think would? How long do you think he’d be in business? Why do you blame Walmart and other businesses for doing exactly what a company is supposed to do in a (somewhat) free-market system?
What may be good for businesses may not always be good for their country or its citizenry. I doubt prices would double for the average product, but if a premium is the cost for keeping more of our neighbors employed and off the government dole, it would probably be worth it.