Here's an 'inconvenient fact for you to ponder..
I am not afraid to attack error, however deeply it may be entrenched, or however widely extended, whenever it becomes my duty to do so, as I believe it to be on this subject and occasion. John C. Calhoun June 27, 1848If he should possess a philosophical turn of mind, and be disposed to look to more remote and recondite causes, he will trace it to a proposition which originated in a hypothetical truism, but which, as now expressed and now understood, is the most false and dangerous of all political errors. The proposition to which I allude, has become an axiom in the minds of a vast majority on both sides of the Atlantic, and is repeated daily from tongue to tongue, as an established and incontrovertible truth; it is that "all men are born free and equal."
So he rejects the Declaration and therefore Jefferson, but he's still your buddy.
Want me to post some stuff on any other of your sainted ancestors?
http://www.indiana.edu/~kdhist/H105-documents-web/week14/CalhounreOregon1848.html