Dredd Scott dismayed Lincoln and the republicans.
But there was no doubt that the Congress had the power to legislate for the territories. That is what the slavers knew, and that is why they tried to duck out on the Constitution.
As for the other, Lincoln is amply on the record well before the war saying that the D of I was meant to apply to black as well as white.
That would make your statement that he preferred a lily white west hard to show in the record.
It is actually just a construct by you that will not bear even the least scrutiny.
Walt
He did? (but not equal enough to share the continent with blacks):
"I think the authors of that notable instrument [the Declaration] intended to include all men, but they did not intend to declare all men equal in all respects." [italics in original]
Abraham Lincoln, "Speech at Springfield, Illinois", 26 Jun 1857, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. II, p. 405."A separation of the races is the only perfect preventive of amalgamation but as an immediate separation is impossible the next best thing is to keep them apart where they are not already together." [italics in original]
Abraham Lincoln, "Speech at Springfield, Illinois", 26 Jun 1857, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. II, p. 408.
"My declarations upon this subject of negro slavery may be misrepresented, but can not be misunderstood. I have said that I do not understand the Declaration to mean that all men were created equal in all respects."
Abraham Lincoln, "Speech at Springfield, Illinois", 17 Jul 1858, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. II, p. 520."What next? Free them, and make them politically and socially, our equals? "
Abraham Lincoln, "First Debate with Stephen A. Douglas at Ottawa, Illinois", 21 Aug 1858, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. III, p. 15."Douglas tries to make capital by charges of negro equality against me. My speeches have been printed and before the country for some time on this question, and Douglas knows the utter falsity of such a charge."
Abraham Lincoln, "Speech at Carlinville, Illinois", 31 Aug 1858, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. III, p. 79."Negroes have natural rights however, as other men have, although they cannot enjoy them here, and even Taney once said that ``the Declaration of Independence was broad enough for all men.'' But though it does not declare that all men are equal in their attainments or social position, yet no sane man will attempt to deny that the African upon his own soil has all the natural rights that instrument vouchsafes to all mankind."
Abraham Lincoln, "Speech at Carlinville, Illinois", 31 Aug 1858, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. III, p. 79."This you have seen in my printed speeches, and with it I have said, that in their right to ``life, liberty and the pursuit of happiness,'' as proclaimed in that old Declaration, the inferior races are our equals."
Abraham Lincoln, "Fifth Debate with Stephen A. Douglas, at Galesburg, Illinois", 7 Oct 1858, Collected Works of Abraham Lincoln, (Roy P. Basler, ed.), Vol. III, pp. 221-222.
Dredd Scott dismayed Lincoln and the republicans.
The decision was hardly a radical shift in attitude, the first naturalization act enacted by the founders limited citizenship to whites only.