Final answer:
Abraham Lincoln referenced the founders of the United States in his speeches to maintain unity and preserve the Union, despite their acceptance or advocacy for slavery.
Step-by-step explanation:
Abraham Lincoln referenced the founders of the United States in his speeches despite their acceptance or advocacy for slavery because he sought to maintain unity and preserve the Union. Although the founders' views on slavery were contradictory to the principles of equality, Lincoln recognized the need to appeal to a diverse audience and unite the country during a time of crisis.
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