Lincoln Mortally Wounded the Constitution

Yes, he did, but it was bound to happen, the way I see it. Also, consider a prophecy by Joseph Smith to Stephan A. Douglas (found here):

unless the United States redress the wrongs committed upon the saints in the state of Missouri and punish crimes committed by her officers, that in a few years the government will be utterly overthrown and wasted, and there will not be so much as a potsherd left, for their wickedness in permitting the murder of men, women and children and the wholesale plunder and extermination of thousands of her citizens to go unpunished, thereby perpetrating a foul and corroding blot upon the fair fame of this great republic, the very thought of which would have caused the high-minded and patriotic framers of the Constitution of the United States to hide their faces with shame.

Rather than this concerning merely the falling of the Whig party, as speculated in the above document, I think it has more to do with Federalism in the United States, that it would be "utterly overthrown and wasted," and replaced with a national Leviathan "which would have caused the high-minded and patriotic framers of the Constitution of the United States to hide their faces with shame," as is easily demonstrated.

For more on the above prophecy, see here.