Three events made the US a continental democracy built out of the colonial Empires of the British, the French and the Spanish under four presidents- Jefferson with Louisiana Purchase, Polk settling the Mexican American War, Lincoln defending the Union, and his vice president buying Alaska from Russia. James Polk 1845-1849 was the 11th president of the US. At the time of the Missouri Compromise he deftly kept the Union together. A protege of president Andrew Jackson from Tennessee Polk also worked hard to create the bicoastal Nation the US is today by extending the work of president Jefferson who setup the Louisiana Purchase from Napoleon, to bring the new Republic's frontiers in the West to the Pacific territories that were part of the Spanish and British colonial Empires. For the northern frontier he settled on the 49th parallel with the British instead of 54 degrees parallel 40 minutes or 54-40 that was the slogan for the Polk 1844 election campaign taking the border to the northern frontier of the Oregon Territory. Polk was faced with settlers in Texas who had set up their own state in the south the Texas Republic under General Sam Houston in 1836. A situation Polk handled by integrating the new Texas Republic into the new Nation and faced with a military taking control of Mexico in 1846 under General Paredes and confrontation with the US, leading the US into the Mexican American War 1846-1848. The integration of Alaska was completed under president Andrew Johnson in 1867- Johnson was Vice president under Abraham Lincoln during the Civil War- when he had Seward negotiate the purchase of Alaska from Russia for 7.2 million dollars in 1867. ...