Answer:
John L. O’Sullivan, and James K
Step-by-step explanation:
John L. O’Sullivan, the editor of a magazine that served as an organ for the Democratic Party and of a partisan newspaper, first wrote of “manifest destiny” in 1845, but at the time he did not think the words profound. Rather than being “coined,” the phrase was buried halfway through the third paragraph of a long essay in the July–August issue of The United States Magazine, and Democratic Review on the necessity of annexing Texas and the inevitability of American expansion. O’Sullivan was protesting European meddling in American affairs, especially by France and England, which he said were acting
Some found the opinion intriguing, but others were simply irritated. The Whig Party sought to discredit Manifest Destiny as belligerent as well as pompous, beginning with Massachusetts Rep. Robert Winthrop’s using the term to mock Pres. James K. Polk’s policy toward Oregon.
Yet unabashed Democrats took up Manifest Destiny as a slogan. The phrase frequently appeared in debates relating to Oregon, sometimes as soaring rhetoric and other times as sarcastic derision. As an example of the latter, on February 6, 1846, the New-Hampshire Statesman and State Journal, a Whig newspaper, described “some windy orator in the House [of Representatives]” as “pouring for his ‘manifest destiny’ harangue.”
Over the years, O’Sullivan’s role in creating the phrase was forgotten, and he died in obscurity some 50 years after having first used the term “manifest destiny.” In an essay in The American Historical Review in 1927, historian Julius W. Pratt identified O’Sullivan as the phrase’s originator, a conclusion that became universally accepted.