This comment on Timothy Burke's article "On Confederate Counterfactuals" describes a story (presumably a novel) the user read about 40 years ago:
[...] the very first Confederate counterfactual I read in the 1970s. Of course I can’t remember the title or author at this remove, but one of its conceits was that the Confederacy couldn’t hold itself together, because states just kept seceding. Florida was an independent republic, for example, and it catered to tourists from the Union.
What story is this?