The nullification crisis was a sectional political crisis in the United States in 1832 and 1833, during the presidency of Andrew Jackson, which involved a confrontation between the state of South Carolina and the federal government. It ensued after South Carolina declared the federal Tariffs of 1828 and 1832 unconstitutional and therefore null and void within the sovereign boundaries of the state.
The controversial and highly protective Tariff of 1828 was enacted into law during the presidency of John Quincy Adams. The tariff was strongly opposed in the South, since it was perceived to put an unfair tax burden on the Southern agrarian states that imported most manufactured goods. The tariff's opponents expected that Jackson's election as president would result in its significant reduction. When the Jackson administration failed to take any action to address their concerns, South Carolina's most radical faction began to advocate that the state nullify the tariff. They subscribed to the legal theory that if a state believed a federal law unconstitutional, it could declare the law null and void in the state. In Washington DC, an open split on the issue occurred between Jackson and Vice President John C. Calhoun, a native South Carolinian and the most effective proponent of the constitutional theory of state nullification.