James K. Polk

President of the United States from 1845 to 1849

James Knox Polk (November 2, 1795 – June 15, 1849) was the 11th president of the United States, serving from 1845 to 1849. A protégé of Andrew Jackson and a member of the Democratic Party, he was an advocate of American expansionism and Jacksonian democracy. Polk saw Texas join the Union in his first year in office; the annexation of the formerly independent republic, which had declared independence from Mexico, was one of the precipitating causes that soon led the U.S. into the Mexican–American War.

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