As demonstrated by the rebound from the 12 years of post Civil War Reconstruction, to Jim Crow laws of racial discrimination far into the next century.
And in the North, non-slavery did not mean equality before the law in dozens of community matters, including marriage, education and employment.
And Lincoln was elected by the more populous Northetn states, did not appear on the ballot of Southetn states.
https://en.wikipedia.org/wiki/Delta_encoding