John Tyler (March 29, 1790 – January 18, 1862) was the tenth president of the United States from 1841 to 1845 after briefly serving as the tenth vice president in 1841; he was elected vice president on the 1840 Whig ticket with President William Henry Harrison. Tyler ascended to the presidency after Harrison's death in April 1841, only a month after the start of the new administration. He was a stalwart supporter and advocate of states' rights, and he adopted nationalist policies as president only when they did not infringe on the powers of the states. His first clash with General Andrew Jackson followed Jackson's 1818 invasion of Florida during the First Seminole War. While praising Jackson's character, Tyler condemned him as overzealous for the execution of two British subjects. Tyler brought the long, bloody Second Seminole War to an end in 1842, and expressed interest in the forced cultural assimilation of Native Americans. He also advocated the establishment of a chain of American forts from Council Bluffs, Iowa to the Pacific.