Military historian and presidential biographer Nigel Hamilton talks about the military face-off between two American presidents – Abraham Lincoln and Jefferson Davis – during the Civil War. He discusses the background of both men, their rise to the presidencies of the Union and the Confederacy, respectively, and the events that led up to attack on Fort Sumter by Confederate forces on April 12, 1861, not long after both men were inaugurated. This is part one of a two-part interview with Mr. Hamilton about his book "Lincoln vs. Davis."     

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