Now you should immediately notice, Calhoun's first section: "We have never dreamt of incorporating into our Union any but the Caucasian race—the free white race.", at first you'd probably find it intriguing, as slaves of this time were not of Caucasian stock but Capoid-Negroid stock from the Ivory Coast of Africa. So you may then ask: "Is he delusional?", I say **no!**, you see, the Southern version of slavery as an institution drastically altered the previous ideals of the institution from up north. Mr. Calhoun, protested the annexation of the entirety of Mexico, "This debate brought to the forefront one of the contradictions of manifest destiny: on the one hand, while identitarian ideas inherent in manifest destiny suggested that Mexicans, as non-whites, would present a threat to white racial integrity and thus were not qualified to become Americans" from my selected source: **Promised Land, Crusader State by Walter A. McDougall**.
Thus for, Manifest Destiny is at a very sharp crossroad astowhere it's direction lay be up for debate at that point in time, where Southern political opposition rejecting total annexation of Mexico, compared to the folk preaching for the absorbing the entirety of it. Now, you may laugh as the main motivation for opposition against annexation of all Mexico has ties to white supremacy; but I say it be a good thing for USA as a whole. But the cessions from Mexico did not cease with 1848, and persisted until later on in the Gadsden Purchase of 1853. Fun fact, the Jefferson Davis [currently a remarkably successful U.S. Senator], proposed limited annexation of specifically most of northeastern Mexico. While the Southern opposition protested total annexation for sake of white racial integrity, It is clear that Manifest Destiny **still** continued despite even **Southern** opposition!
