Presidency of James K. Polk
| The Polk Cabinet | ||
|---|---|---|
| Office | Name | Term |
| President | James K. Polk | 1845–1849 |
| Vice President | George M. Dallas | 1845–1849 |
| Secretary of State | James Buchanan | 1845–1849 |
| Secretary of Treasury | Robert J. Walker | 1845–1849 |
| Secretary of War | William L. Marcy | 1845–1849 |
| Attorney General | John Y. Mason | 1845–1846 |
| Nathan Clifford | 1846–1848 | |
| Isaac Toucey | 1848–1849 | |
| Postmaster General | Cave Johnson | 1845–1849 |
| Secretary of the Navy | George Bancroft | 1845–1846 |
| John Y. Mason | 1846–1849 | |
The presidency of James K. Polk began on March 4, 1845, when he was inaugurated as the 11th President of the United States, and ended on March 4, 1849. James K. Polk, a Democrat, assumed office after defeating Whig Henry Clay in the 1844 presidential election. Polk left office after one term, fulfilling a campaign pledge he made in 1844, and he was succeeded by Whig Zachary Taylor. A close ally of Andrew Jackson, Polk's presidency reflected his adherence to the ideals of Jacksonian democracy and manifest destiny.
Polk is often considered the last strong pre-Civil War president, having met during his four years in office every major domestic and foreign policy goal set during his campaign and the transition to his administration. When Mexico rejected the U.S. annexation of Texas, Polk achieved a sweeping victory in the Mexican–American War, which resulted in the cession by Mexico of nearly the whole of what is now the American Southwest. He ensured a substantial reduction of tariff rates by replacing the "Black Tariff" with the Walker tariff of 1846, which pleased the less-industrialized states of his native South by rendering less expensive both imported and, through competition, domestic goods. He threatened war with the United Kingdom over the issue of which nation owned the Oregon Country, eventually reaching a settlement in which the British were made to sell the portion that became the Oregon Territory. Additionally, he built an independent treasury system that lasted until 1913, oversaw the opening of the U.S. Naval Academy and of the Smithsonian Institution, the groundbreaking for the Washington Monument, and the issuance of the first United States postage stamp.
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