Reveal The Truth. The War For Southern Independence. Text: "U.S. President Abe Lincoln in 1860 & 1861 supported and lobbied for the passage of the CORWIN AMENDMENT, guaranteeing U.S. "slavery in perpetuity" if only the Southern states would return to the Union. It passed the U.S. House 133-65 and the U.S. Senate 24-12. The Southern states ignored Lincoln and this amendment because slavery was NOT the reason for secession. Excessive taxes, states rights and lack of fair representation in the federal government led the Southern states to legally secede.