James Madison led one of the most influential and prolific lives in American history, and his story -- although all too often overshadowed by his more celebrated contemporaries -- is integral to that of the nation. Madison helped to shape our country as perhaps no other Founder: collaborating on the Federalist Papers and the Bill of Rights, resisting government overreach by assembling one of the nation's first political parties (the Republicans, who became today's Democrats), and taking to the battlefield during the War of 1812, becoming the last president to lead troops in combat.