James K Polk is probably the epitome of 'bad person [by modern standards] but good for the country,' with his haggling over the PNW for Britain, and his conquest of texas and the southwest via the Texan squatters and war with Mexico. However, at the same time, he enabled the massacre of thousands of natives and sent the military after the Mormons. Given that he promised to manifest America's destiny in only one term, but also that he pulled it off with aplomb and made good on his campaign, could he have won a second term if he wanted and what would that look like?