Answer :
Final answer:
Calhoun's nullification theory allowed states to declare federal laws unconstitutional, leading to the Nullification Crisis in the 1830s.
Explanation:
Calhoun's nullification theory centered around the idea that states had the right to nullify federal laws they deemed unconstitutional. According to Calhoun, if a state found a law objectionable, it could declare it null and void within its borders through a special state convention. This theory ultimately led to the Nullification Crisis in the 1830s during Jackson's presidency.
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