page_title: Texas annexation
section_title: Benton Senate compromise
hierarchical_section_title: Texas annexation / Congressional debate over annexation / Benton Senate compromise
caption_attribution_description: English: Daguerreotype of United States Senator from Missouri Thomas Hart Benton. Image courtesy of the Harvard University Library.
context_page_description: The Texas annexation was the 1845 annexation of the Republic of Texas into the United States of America, which was admitted to the Union as the 28th state on December 29, 1845.
  The Republic of Texas declared independence from the Republic of Mexico on March 2, 1836. It applied for annexation to the United States the same year, but was rejected by the Secretary of State. At the time the vast majority of the Texian population favored the annexation of the Republic by the United States. The leadership of both major U.S. political parties, the Democrats and the Whigs, opposed the introduction of Texas, a vast slave-holding region, into the volatile political climate of the pro- and anti-slavery sectional controversies in Congress. Moreover, they wished to avoid a war with Mexico, whose government refused to acknowledge the sovereignty of its rebellious northern province. With Texas's economic fortunes declining by the early 1840s, the President of the Texas Republic, Sam Houston, arranged talks with Mexico to explore the possibility of securing official recognition of independence, with the United Kingdom mediating.
  In 1843, U.S.
context_section_description: By early February 1845, when the Senate began to debate the Brown-amended Tyler treaty, its passage seemed unlikely, as support was "perishing". The partisan alignments in the Senate were near parity, 28–24, slightly in favor of the Whigs. The Senate Democrats would require undivided support among their colleagues, and three or more Whigs who would be willing to cross party lines to pass the House-amended treaty. The fact that Senator Foster had drafted the House amendment under consideration improved prospects of Senate passage.
  Anti-annexation Senator Thomas Hart Benton of Missouri had been the only Southern Democrat to vote against the Tyler-Texas measure in June 1844. His original proposal for an annexed Texas had embodied a national compromise, whereby Texas would be divided in two, half slave-soil and half free-soil. As pro-annexation sentiment grew in his home state, Benton retreated from this compromise offer. By February 5, 1845, in the early debates on the Brown-amended House bill, he advanced an alternative resolution that, unlike the Brown scenario, made no reference whatsoever to the ultimate free-slave apportionment of an annexed Texas and simply called for five bipartisan commissioners to resolve border disputes with Texas and Mexico and set conditions for the Lone Star Republic's acquisition by the United States.
  The Benton proposal was intended to calm northern anti-slavery Democrats (who wished to eliminate the Tyler-Calhoun treaty altogether, as it had been negotiated on behalf of the slavery expansionists), and allow the decision to devolve upon the soon-to-be-inaugurated Democratic President-elect James K. Polk. President-elect Polk had expressed his ardent wish that Texas annexation should be accomplished before he entered Washington in advance of his inauguration on March 4, 1845, the same day Congress would end its session. With his arrival in the capital, he discovered the Benton and Brown factions in the Senate "paralyzed" over the Texas annexation legislation. On the advice of his soon-to-be Secretary of the Treasury Robert J. Walker, Polk urged Senate Democrats to unite under a dual resolution that would include both the Benton and Brown versions of annexation, leaving enactment of the legislation to Polk's discretion when he took office. In private and separate talks with supporters of both the Brown and Benton plans, Polk left each side with the "impression he would administer their [respective] policy. Polk meant what he said to Southerners and meant to appear friendly to the Van Burenite faction." Polk's handling of the matter had the effect of uniting Senate northern Democrats in favor of the dual alternative treaty bill.
  On February 27, 1845, less than a week before Polk's inauguration, the Senate voted 27–25 to admit Texas, based on the Tyler protocols of simple majority passage. All twenty-four Democrats voted for the measure, joined by three southern Whigs. Benton and his allies were assured that Polk would act to establish the eastern portion of Texas as a slave state; the western section was to remain unorganized territory, not committed to slavery. On this understanding, the northern Democrats had conceded their votes for the dichotomous bill. The next day, in an almost strict party line vote, the Benton-Milton measure was passed in the Democrat-controlled House of Representatives. President Tyler signed the bill the following day, March 1, 1845 (Joint Resolution for annexing Texas to the United States, J.Res. 8, enacted March 1, 1845, 5 Stat. 797).
caption: Senator Thomas Hart Benton of Missouri
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