USA HISTORY

Detailed explanation-1: -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.

Detailed explanation-2: -Texas withdrew the annexation offer in 1838; President Mirabeau B. Lamar (1838–41) opposed annexation and did not reopen the question.

Detailed explanation-3: -As early as 1836, Texans had voted for annexation by the United States, but the proposition was rejected by the Andrew Jackson and Martin Van Buren administrations.

Detailed explanation-4: -Those against annexing Texas argued that it would spread slavery even further West and drive the United States closer to a civil war. Opponents also pointed out that Mexico did not want the United States to annex Texas and become its neighbor; they believed annexing Texas could lead to war with Mexico.