>>The basic reason is that there is plenty of manufacturing all over the Midwest that could easily produce the entire Apple supply chain.

Do you have a source for that? Foxconn has greater than 1 million employees. I don't think there is any company with a labor force of that scale in the US, or anywhere else in the world. And, per the article at the top of this thread, the bigger issue is the supply chain. If iPhones were made in the Midwest, they would still be importing glass, simple hardware, and thousands of other parts that are still made in China.