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Evolution of Lincoln's policies

Although Lincoln stated in the Emancipation Proclamation that he "sincerely believed to be an act of justice," he issued it as a "military necessity," because he believed that the U.S. Constitution would not permit it on any other basis. The Emancipation Proclamation was a war tactic, because by freeing enslaved people it deprived the South of labor, and it allowed African American people to "be received into the armed service of the United States." Lincoln worried about the consequences of his action, fearing an endemic racial divide in the nation. Nonetheless, during his second presidential campaign, he ran on a platform to forever abolish slavery by constitutional amendment.