There actually are quite a few US boot manufactures. Of course, you will need to be prepared to pay a higher price than products made in lower cost Asian countries.
I have examples of most of the ones mentioned above (Kenetrek:Mountain Extreme and Pac Boot, Schnees, and about 10 pair of Russell's in various models). There are also great boots made in Italy (Scarpa, etc), Germany (Lowa, Hanwag, Meindl, Zamberlan, etc) that I also have. It really boils down to how you are going to use them, how the last used will fit your foot and how stiff you want them.
As for Red Wing using prison labor and making 700% profit on each pair of US made boots/shoes, I suspect this is some conspiracy theory parroted by gullible, useful idiots?