The American movement to acquire the region known as Texas has "been the subject of countless monographs and journal articles. Although the literature on the Texas movement is voluminous, no historian has produced an interpretive synthesis based on that literature and the extant documentary sources. This work is intended "to fill that void "by offering speculative analysis as well as a chronological narrative on the total movement. The scope of this work is comprehensive. It traces the American government's handling of the Texas issue from 1819—-the year President James Monroe agreed to drop the American claim to Texas in the Adams-Onis treaty—through 1845—the year President James K. Polk signed a congressional resolution granting Texas statehood. Throughout these years the countervailing political forces of antebellum America had more influence on the government's Texas position than did diplomatic considerations. Consequently, the theme of this dissertation is that the American movement to acquire Texas was primarily a political movement. Indeed, the Texas Republic became an American state only when the annexation issue became inextricably linked with the party trammels and political philosophies of Jacksonian America.