When he was elected President in 1845, James K. Polk was only 49 years old-at that time the youngest president ever to be elected. He faced a conflicted nation on the verge of tremendous territorial expansion. James K. Polk's four years in office marked the greatest period of territorial acquisition in the history of the country-what New York journalist John O'Sullivan termed as the 'Manifest Destiny' of the United States to expand across the continent...
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19th Century Biographical Biographies Biographies & History Biography & History Historical History International Relations Leaders & Notable People Modern (16th-21st Centuries) Political Political Science Politics & Government Politics & Social Sciences Presidents & Heads of State Social Sciences