What justification has mr. Polk made for the annexation of the United States of America

His supporters in the 1844 campaign had promoted the occupation of the entire territory, as encapsulated in their slogan (which Polk did not disavow), "54°40' or Fight." Both Great Britain and the United States had jointly occupied this region since 1818, and it was clear that Polk wanted the west coast of North.

Explanation:

This is the best I could do! Hope it helps! :)

answer; (a) he was a u.s senator for 38 years;

you can't, there's no way sorry