Answer:
Regional identities, after the American Revolutionary War, began to coalesce in two big coalitions: the Northern Coalition, which was pro-industry, anti-slavery (abolitionist), pro-tariffs, and tolerant of many immigrant groups.
And anotehr coalition, in the South: formed by southern slave lords in the Deep South, who obviously defended slavery, and also by Appalachian frontiersmen, who sometimes sided with the Northerners, but most often sided with the deep southerners due to their mistrust of federal government encroachment.