manifest destiny was used as a justification for the us annexation of
Manifest destiny Newspaper editor John O'Sullivan is generally credited with coining the term manifest destiny in 1845 to describe the essence of this mindset, which was a rhetorical tone;[6] however, the unsigned editorial titled "Annexation" in which it first appeared was arguably written by journalist and annexation advocate Jane Cazneau.[7] The term was used by Democrats in the 1840s to justify the war with Mexico and it was also used to divide half of Oregon with the United Kingdom. But manifest destiny always limped along because of its internal limitations and the issue of slavery, says Merk. It never became a national priority. By 1843 John Quincy Adams, originally a major supporter of the concept underlying manifest destiny, had changed his mind and repudiated expansionism because it meant the expansion of slavery in Texas.[8]
Texas annexation The Anglo-American immigrants residing in newly-independent Texas overwhelmingly desired immediate annexation by the United States.[39] But, despite his strong support for Texas independence from Mexico,[40] then-President Andrew Jackson delayed recognizing the new republic until the last day of his presidency to avoid raising the issue during the 1836 general election.[41][42] Jackson's political caution was informed by northern concerns that Texas could potentially form several new slave states and undermine the North-South balance in Congress.[43]