Changes

[[File:James Polk restored.jpg|thumbnail|250px|left|President James Polk - the primary advocate for the "54'50'' or fight" mantra]] By 1843, increased American immigration on the Oregon Trail to the Territory made the border issue a burning one in Congress, where jingoists raised the slogan of “54 degrees 40 minutes or fight.” President James Polk, a supporter of Manifest Destiny with an eye also on the Mexican Southwest and California, was eager to settle the boundary of the Oregon Territory and proposed a settlement on the 49 -degree line to Great Britain.