I guess Kevin is mixing threats of nullification with the Confederate insurrection as the basis to say the untested principle up until the Confederate insurrection, was a principled enshrined in American law. It was not. It was argued over. When it was tested and even before people were all over the place -- undecided some, but not a great Southerner:
During the "nullification crisis" of 1828-1833, South Carolina threatened to nullify a federal law regarding tariffs.
Andrew Jackson issued a proclamation against the doctrine of nullification, stating: "I consider...the power to annul a law of the United States, assumed by one State, incompatible with the existence of the Union, contradicted expressly by the letter of the Constitution, unauthorized by its spirit, inconsistent with every principle on which it was founded, and destructive of the great object for which it was formed."
He also denied the right to secede: "The Constitution...forms a government not a league...To say that any State may at pleasure secede from the Union is to say that the United States is not a nation."
-http://en.wikipedia.org/wiki/Kentucky_and_Virginia_Resolutions