テキサス併合
Polk's adoption of Manifest Destiny paid dividends at the polls. No longer identified with the Tyler-Calhoun "southern crusade for slavery", the western Democrats could embrace Texas annexation. The Democrats enjoyed a huge upsurge in voter turnout, up to 20% over the figures from 1840, especially in the Northwest and Mid-Atlantic regions. The Whigs showed only a 4% increase.