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John L. O’Sullivan—“Manifest Destiny”: John L. O’Sullivan, a newspaper editor in New York City, was the premier supporter and spokesman for westward expansion. O’Sullivan backed Democratic President James Polk’s desire to annex Texas, Oregon, and California. In his support he wrote many articles and coined the term “Manifest Destiny” to describe America’s inevitable future occupying the North American continent from the Atlantic to the Pacific.
John O'Sullivan, "Annexation," United…
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