Isn't the UNITED STATES the federal entity? Wasn't it only given jurisdiction over that which the States don't?

That is the first time I've read the argument that the 13th amendment can be a grounds for arguing we didn't voluntarily submit to be a citizen of the UNITED STATES.

If you edited your blog post to provide some section headings, it would be much easier to read. Use "##" prefix to make a heading. Congratulations for putting up a blog post on a new platform in spite on your ailing vision.