USA HISTORY

Detailed explanation-1: -Democrats replied Polk was the candidate who stood for expansion. He linked the Texas issue, popular in the South, with the Oregon question, attractive to the North. Polk also favored acquiring California. Even before he could take office, Congress passed a joint resolution offering annexation to Texas.

Detailed explanation-2: -The vote went largely along party lines: Whigs had opposed it almost unanimously (1–27), while Democrats split, but voted overwhelmingly in favor (15–8). The election campaign had hardened partisan positions on Texas among Democrats.

Detailed explanation-3: -Polk supported immediate annexation of Texas because he argued it was originally part of the Louisiana Purchase but was unjustly lost with the Adams-Onis Treaty of 1819. Polk ran on an expansionist platform where his main promises consisted of the annexation of Texas and the Oregon Territory.

Detailed explanation-4: -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.