The Urban Liberal tax and spend people beat the Rural Conservative free trade advocates because they had four times the population.
In 1860 the US population was 80% rural. The Eastern states were more urbanized than the South, but the difference between the South and the Midwest in terms of urbanization was not that great. States like Indiana and Iowa and even Vermont were still overwhelmingly rural. And even in some of the more urban states, most people were a generation or so removed from the farm. Nor was anybody especially "Liberal tax and spend" by today's standards. Stop spreading fake history.