Kate Masur's book, Til Justice Done, is about the civil rights movement in the antebellum period and the Souths' constant reaching and imposition on Northern states really started to drive civil rights in the 1850s. A lot of states expanded citizenship to Black Americans during that period, that's part of what Dred Scott was about. States were also trying to force equal application of the privileges and immunities clause, etc. Ohio really did a 180 during the period and is an instructive example.