The South Carolina Exposition and Protest, also known as Calhoun's Exposition, was written in December 1828 by John C. Calhoun, then Vice President of the United States under John Quincy Adams and later under Andrew Jackson. Calhoun did not formally state his authorship at the time, though it was widely suspected and later confirmed.
The document was a protest against the Tariff of 1828, also known as the Tariff of Abominations. It stated also Calhoun's Doctrine of nullification, i.e., the idea that a state has the right to reject federal law, first introduced by Thomas Jefferson and James Madison in their Kentucky and Virginia Resolutions.