Original: John Caldwell Calhoun (March 18, 1782 - March 31, 1850) was the 7th Vice President of the United States and a leading Southern politician from South Carolina during the first half of the 19th century.
Simplified: John Caldwell Calhoun (March 18, 1782 - March 31, 1850) was the vice-president for Andrew Jackson, an American President.