President Pierce was the 14th president of the United States and he served from 1853 to 1857. There are several synonyms for the term "President Pierce" that can be used interchangeably. These include Franklin Pierce, the 14th president of the United States, the Chief Executive of the Union, Commander-in-Chief of the Armed Forces, and the President of the United States. President Pierce was a Democrat who was known for his support of the controversial Kansas-Nebraska Act, which allowed slavery in new territories. Despite his efforts, his presidency was marred by controversy and criticism, which ultimately led to his defeat in the 1856 presidential election.