テキサス併合
In August 1844, in the midst of the campaign, Tyler withdrew from the race. The Democratic Party was by then unequivocally committed to Texas annexation, and Tyler, assured by Polk's envoys that as president he would effect Texas annexation, urged his supporters to vote Democratic. Polk narrowly defeated Whig Henry Clay in the November election. The victorious Democrats were poised to acquire Texas under President-elect Polk's doctrine of Manifest Destiny, rather than on the pro-slavery agenda of Tyler and Calhoun.