[Who is John Galt?]

Why did Lincoln not oppose Corwin? Because, he said in effect: it was pure eyewash, typical Congress trying to "do something" and in fact made no real change to slavery as it was then recognized.

Please see my Post #148 (plus link in Post #152), for Mr. Lincoln's own proposal from December 1862...

[BroJoeK]

WIJG: "Please see my Post #148 (plus link in Post #152), for Mr. Lincoln's own proposal from December 1862... "

Right, in 1862 (iirc) Congress abolished slavery in Washington, DC, with compensation for slaveholders.
That was Lincoln's ideal at the time.
Later, it seems, the cost of Civil War in blood & treasure made thoughts of compensation for slaveholders impossible.