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The Constitution and the Union
| Roots of the Slavery Crisis
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Speech on the Kansas-Nebraska Act
| Crisis of Constitutionalism
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Speech on the Dred Scott Decision
| Crisis of Constitutionalism
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Farewell Address to the Senate
| Secession and Civil War
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First Inaugural Address
| Secession and Civil War
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Message to Congress in Special Session
| Secession and Civil War
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Gettysburg Address
| Secession and Civil War
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Socialism and Democracy
| Progressive Rejection of the Founding