What did Calhoun base his political platform devotion on?

John C. Calhoun based his political platform on the principles of states' rights and the protection of minority interests, particularly in relation to slavery. He argued that the federal government should have limited powers and that states should retain authority over their own affairs. Calhoun believed in the necessity of a concurrent majority, where significant decisions required the agreement of various interest groups to prevent tyranny of the majority. This philosophy underpinned his defense of Southern interests and the institution of slavery during his political career.