The third question which Mr. Lincoln presented is--If the Supreme Court of the United States shall decide that a State of this Union cannot exclude slavery from its own limits, will I submit to it? I am amazed that Mr. Lincoln should ask such a question. Mr. Lincoln's object is to cast an imputation upon the Supreme Court. He knows that there never was but one man in America, claiming any degree of intelligence or decency, who ever for a moment pretended such a thing. It is true that the _Washington Union_, in an article published on the 17th of last December, did put forth that doctrine, and I denounced the article on the floor of the Senate. * * * Lincoln's friends, Trumbull, and Seward, and Hale, and Wilson, and the whole Black Republican side of the Senate were silent. They left it to me to denounce it. And what was the reply made to me on that occasion? Mr. Toombs, of Georgia, got up and undertook to lecture me on the ground that I ought not to have deemed the article worthy of notice, and ought not to have replied to it; that there was not one man, woman, or child south of the Potomac, in any slave State, who did not repudiate any such pretension. Mr. Lincoln knows that reply was made on the spot, and yet now he asks this question! He might as well ask me--Suppose Mr. Lincoln should steal a horse, would I sanction it; and it would be as genteel in me to ask him, in the event he stole a horse, what ought to be done with him. He casts an imputation upon the Supreme Court of the United States, by supposing that they would violate the Constitution of the United States. I tell him that such a thing is not possible. It would be an act of moral treason that no man on the bench could ever descend to. Mr. Lincoln himself would never, in his partisan feelings, so far forget what was right as to be guilty of such an act.