James Knox Polk (November 2, 1795 – June 15, 1849) was the 11th president of the United States, serving from 1845 to 1849. It eventually passed in 1840.Using his thorough grasp of the House's rules, Polk attempted to bring greater order to its proceedings. Unlike many of his peers, he never challenged anyone to a duel no matter how much they insulted his honor. Other Polk relatives visited at the White House, some for extended periods. By treaty, Russia had waived any claim south of the southern border of Alaska, which it possessed until 1867, and Spain, which claimed the Pacific Coast to the 42nd parallel, ceded any claims it might have north of that to the United States under the Adams–Onís Treaty of 1819. This was just before Mexico gained its independence from Spain in 1821.
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