Winning by a narrow margin, Polk campaigned on his strong support for westward expansion, a hotly debated issue that was dodged by other candidates.

• 波尔克在选举中险胜，而他在竞选时大力支持美国应该向西部扩张，虽然这是相当热门的话题，但是其他候选人似乎都刻意迴避。