Which of the following territories was not sought by Polk?

James K. Polk, who served as President from 1845 to 1849, had a clear expansionist agenda that focused on acquiring territories in the west. California and Texas were key targets, as they were seen as vital for fulfilling the concept of Manifest Destiny. The Oregon territory was also a significant area of focus, as Polk sought to secure the entire region for the United States, leading to negotiations with Britain.

In contrast, Alaska was not a territory that Polk sought during his administration. While Alaska was eventually purchased from Russia in 1867, this acquisition occurred well after Polk's presidency. His administration was primarily concerned with territories in the contiguous United States, specifically regions that would contribute to the development of the nation. Therefore, Alaska is the territory that does not align with Polk's expansionist goals.