How did John C. Calhoun achieve national prominence?

John C. Calhoun achieved national prominence through his roles as a prominent politician and statesman in the early 19th century. Initially serving as a congressman and later as Secretary of War, he gained recognition for his strong advocacy of states' rights and limited federal government. His involvement in key political debates, including those surrounding tariffs and slavery, particularly through his defense of Southern interests, further elevated his stature. Additionally, his tenure as Vice President under both John Quincy Adams and Andrew Jackson solidified his influence in national politics.