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IIRC, after victory in the American Civil War, the dominant Republican party of the United States provisioned for the reorganization of the western territories and their admission into the Union as pro-GOP states (after some gerrymandering, of course).
So, assume that the ACW is delayed for until at least the 1870's, perhaps indefinitely if you want to (Corwin Ammendment gets passed?). What are the effects on the geographical partition of the western territories?
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