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James K. Polk

11th President of the United States

James K. Polk, a protégé of Andrew Jackson, expanded U.S. territory through the Mexican–American War. He served as Speaker of the House and governor of Tennessee before becoming president. Polk achieved major goals like tariff reduction and reestablishment of the Independent Treasury system. He kept his pledge to serve only one term and left office in 1849.

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James K. Polk