How did vice president calhoun justify nullification?

Vice President John C. Calhoun justified nullification by arguing that states had the right to reject Federal Laws they deemed unconstitutional. He believed that the Constitution was a compact among sovereign states, and if the federal government exceeded its powers, states could nullify those laws to protect their rights and interests. Calhoun asserted that this principle was essential to preserving the balance of power between state and federal authority. His justification was rooted in the belief that a government should serve the interests of its constituents, and states should have the final say on the legality of federal actions.