The Nullification Crisis was caused by South Carolina's signing of the 1832 Ordinance of Nullification, which ruled the Tariffs of 1828 and 1832 unconstitutional. It confirmed the notion that a state's power should overrule federal laws that were not part of the United States Constitution.
In 1832, South Carolina declared the power of the state should supersede, or nullify, certain federal laws. In this particular case, the state found two particular tariffs that were not included in the U.S. Constitution were detrimental to the economic standing in South Carolina. Under the Ordinance, the South Carolina convention was given unlimited power. There was disagreement within the state and between it and other states, which led to what has been termed the Nullification Crisis.