USA HISTORY

Detailed explanation-1: -American President James K. Polk was an expansionist who supported Manifest Destiny and believed that the “inferiority” of Mexico justified such expansion. This led Polk and America to go war in the Mexican-American War, which resulted in America adding a significant area of land to the southwest.

Detailed explanation-2: -More than any other President, Polk pursued “Manifest Destiny, ” a phrase coined by his fellow Jacksonian Democrat, John L. O’Sullivan, to express the conviction that Providence had foreordained the United States to spread its republican institutions across North America.

Detailed explanation-3: -US President James K. Polk (1845-1849) is the leader most associated with Manifest Destiny. Manifest Destiny inflamed sectional tensions over slavery, which ultimately led to the Civil War.

Detailed explanation-4: -Polk was backed by many in the United States who believed they had the God-given right to rule the territories to the west. This Manifest Destiny was presented as giving the U.S. permission to do what was necessary to conquer those lands. As a result, the U.S. waged war to take the northern half of Mexico.

Detailed explanation-5: -The philosophy describing the necessary expansion of the nation westward was called Manifest Destiny; the belief that it was our duty to settle the continent, conquer and prosper.