Abraham Lincoln and the Corwin AmendmentThe amendment was prematurely called the thirteenth amendment. Corwin's amendment, as it was then called, was one of three attempts to resolve the secession crisis between Lincoln's election in November 1860 and the firing on Fort Sumter in April 1861. The Crittenden plan and the Washington Peace Convention were unacceptable to Republicans because they yielded too much to the slave interests and rejected the central plank of the Republican platform, which opposed the extension of slavery.
In his inaugural address, Lincoln noted Congressional approval of the Corwin amendment and stated that he "had no objection to its being made express and irrevocable." This was not a departure from Lincoln's views on slavery at that time. Lincoln followed the Republican platform from the Chicago convention. He believed that the major problem between the North and South was the inability to reach agreement with respect to the expansion of slavery. Lincoln did not believe that he had the power to eliminate slavery where it already existed. However, Southerners feared that a Republican administration would take direct aim at the institution of slavery. By tacitly supporting Corwin's amendment, Lincoln hoped to convince the South that he would not move to abolish slavery and, at the minimum, keep the border states of Maryland, Virginia, Tennessee, Kentucky, and North Carolina from seceding.
(Also, Paradox Interactive video games>Public education, knew about the Corwin Amendment and a few other attempts to preserve the union (and reasons for them) due only to Victoria II)