James K. Polk was an American politician who served as the 11th President of the United States from 1845 to 1849. When searching for synonyms of James Polk, several terms come to mind, including former President, Democrat, and commander-in-chief. Polk was known for his expansionist policies regarding territorial acquisition, which led to the Mexican-American War and the acquisition of California and New Mexico. In addition, Polk was a firm believer in manifest destiny, the idea that it was America's burden to expand its territory. Other synonyms for James Polk include reformer, advocate, and negotiator, as he was dedicated to advancing the country through political and economic means.