Video : Kansas-Nebraska Act allowed popular sovereignty to determine slavery; heightened sectional tensions pre-Civil War.

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Stephen A. Douglas – "The great principle of self-government is at stake, and surely the people of this country are never going to decide that the principle upon which our whole republican system rests is vicious and wrong.

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Artist: Image is part of Brady-Handy Photograph Collection | Credit: This image is available from the United States Library of Congress's Prints and Photographs division under the digital ID cwpbh.00882.This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons: Licensing.

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