In the general election, Polk ran against U.S. Senator Henry Clay (1777-1852), a Kentuckian and a founder of the Whig Party. The Whigs used the campaign slogan “Who is James K. Polk?”–an allusion to the fact that Polk was not well known outside the world of politics. However, Polk’s expansionist platform favoring the annexation of Texas appealed to voters. He narrowly won the presidency with 49.5 percent of the popular vote and an electoral margin of 170-105.
*Hope this helps
