What was Calhouns doctrine of Nullification?
Joseph, has provided you with some very good links. If you follow and study them you will learn a great deal and your question will be fully answered. All I can add is a perspective of context to one of the great minds of our nation’s history. You first should understand that the nation we have today as representative of the relationship between the federal government, the States, and the people, is very different than it was in the times of John C. Calhoun. While today most people view that relationship as more or less cast in concrete, in those times the country was new and that relationship was viewed quite differently. For example, most people (then) viewed themselves as first, a citizen of their State and then a citizen of the United States some recognized only being a citizen of their State. Today such a view seems very alien, but then it was a view that many of the Founders accepted as valid. In the sources provided by Joseph you will find reference to the Kentucky and Virginia
