I was sure it was Polk. Polk's success in the 1844 Presidential race was not really sectional. Polk ran on a firm platform of admitting Texas to the Union, and dealing firmly with the UK over Oregon. His opponent Henry Clay was not so sure. Polk took the lower South, and NY, PA, Il and IN among others . Clay got TN, NC, Ky and MD.and others. War with Mexico was a real possibility with Texas becoming a state. Polk's administration may be seen as a jump in "Manifest Destiny" as much as anything.Thanks for your response and pointing out my error.
I was referring to James K. Polk, Democrat from that decidedly not northern State of Tennessee.