How many years did John A. Calhoun serve as ambassador to Chad?
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Answer
John A. Calhoun never served as ambassador to Chad. He was a prominent American politician who served as the seventh vice president of the United States from 1825 to 1832. He also served as secretary of war, secretary of state, and senator from South Carolina.
Unveiling Diplomacy: The Life and Legacy of John A. Calhoun