Peaceful Union/Confederacy Seperation?

Is there any possibility to see a peaceful cession of the American South, without any sort of military conflict between the two nations for at least ten years?
 
Theoretically possible in some circumstances that didn't arise OTL, not possible without such drastic changes that it would be hard to justify a CSA in any sense we'd recognize.

The kind of president who would submit to the extent necessary isn't the kind that would have a scenario where the South splits.
 
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