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Clip: Season 1 | 3m 16s
| Video has closed captioning.
By mid-century, the country was deeply divided. Southerners feared the North might forbid slavery. Northerners feared slavery might move west. As each new state was added to the union, it threatened to upset the delicate equilibrium of power.
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Production made possible by grants from General Motors Corporation, National Endowment for the Humanities, Corporation for Public Broadcasting, The Arthur Vining Davis Foundations, John D and Catherine T MacArthur Foundation
