There was only an import tax. How would Southern cotton be taxed by that?
Have you ever seen the movie "Kidco"?
The movie features a bunch of kids that create a business selling horse manure from their father's farm to people as fertilizer.
The State comes after them for failing to pay taxes on the "product."
The Kid calls his father into court and asks him if he pays taxes on the horse feed when he buys it. The Father says he does.
The Kid tells the court that Taxes were paid on his product before they went into the horse, so the product coming out of the horse has already been taxed.
It works like that.
Depends on whether you are taxing the back end of the horse or the front end of the horse. It's still taxing the same product.
The kid wins his case.
It has been a while since college, a little hazy, but the Northerners had some deal whereby the Southerners had to pay some kind of tax to the Federal government and it was used by the Northern states. In fact, Lincoln mentioned it as reason not to negotiate with the Southerners. It was one of the causes of the South leaving.