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The Wilmot Proviso proposed an American law to ban slavery in any territory acquired from Mexico in the Mexican War.〔 〕 The conflict over the proviso was one of the major events leading to the American Civil War. Congressman David Wilmot first introduced the proviso in the United States House of Representatives on August 8, 1846, as a rider on a $2,000,000 appropriations bill intended for the final negotiations to resolve the Mexican–American War (this was only three months into the two-year war). It passed the House but failed in the Senate, where the South had greater representation. It was reintroduced in February 1847 and again passed the House and failed in the Senate. In 1848, an attempt to make it part of the Treaty of Guadalupe Hidalgo also failed. Sectional political disputes over slavery in the Southwest continued until the Compromise of 1850. ==Background== After an earlier attempt to acquire Texas by treaty had failed to receive the necessary two-thirds approval of the Senate, the United States annexed the Republic of Texas by a joint resolution of Congress that required simply a majority vote in each house of Congress. President John Tyler signed the bill on March 1, 1845, a few days before his term ended. As many expected, the annexation led to war with Mexico. After the capture of New Mexico and California in the first phases of the war, the political focus shifted to how much territory would be acquired from Mexico. The key to this was the determination of the future status of slavery in any new territory. Both major political parties had labored long to keep divisive slavery issues out of national politics. The Democrats had generally been successful in portraying those within their party attempting to push a purely sectional issue as extremists that were well outside the normal scope of traditional politics.〔 Silbey pg. 123 〕 However, midway through Polk's term, Democratic dissatisfaction with the administration was growing within the Martin Van Buren, or Barnburner, wing of the Democratic Party over other issues. Many felt that Van Buren had been unfairly denied the party's nomination in 1844 when southern delegates resurrected a convention rule, last used in 1832, requiring that the nominee had to receive two-thirds of the delegate votes. Many in the North were also upset with the Walker tariff which reduced the tariff rates; others were opposed to Polk's veto of a popular river and harbor improvements bill, and still others were upset over the Oregon settlement with Great Britain where it appeared that Polk did not pursue the northern territory with the same vigor he used to acquire Texas. Polk was seen more and more as enforcing strict party loyalty primarily to serve southern interests.〔 Morrison p.42. Johannsen pg. 202. Potter pg. 22–29 〕 The Whigs faced a different scenario. The victory of James K. Polk (Democrat) over Henry Clay (Whig) in the 1844 presidential election had caught the southern Whigs by surprise. The key element of this defeat, which carried over into the congressional and local races in 1845 and 1846 throughout the South, was the party's failure to take a strong stand favoring Texas annexation. Southern Whigs were reluctant to repeat their mistakes on Texas, but, at the same time, Whigs from both sections realized that victory and territorial acquisition would again bring out the issue of slavery and the territories. In the South in particular, there was already the realization, or perhaps fear, that the old economic issues that had defined the Second Party System were already dead. Their political goal was to avoid any sectional debate over slavery which would expose the sectional divisions within the party.〔 Cooper pg. 225–229. 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wilmot Proviso」の詳細全文を読む スポンサード リンク
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