It is indeed very difficult to ascertain what is really made in the USA these days or any other country for that matter. We live in an ever shrinking global economy which has blurred that line. Unless you are willing to forgo modern conveniences, it's nearly impossible to buy 100% American. There are no cars that are built from parts that are all made in the USA. There are no consumer electronics that are 100% made in the USA. Unless your Amish, some of your stuff is going to be foreign made. And if you buy products from a publicly traded company, of course there are going to be foreign investors.
I don't like to see industry going overseas, but its a fact of life. Economics dictates it. In my business, if I were to sell only goods produced in the US, I'd be out of business. I'm an American and all of my employees are legal American citizens.