as slave territory, as espoused by the Ostend Manifesto. Northern Democrats called for "popular sovereignty", which in theory would allow the residents in a territory to decide for themselves the legal status of slavery. In practice, in Kansas Territory, it produced a state-level civil war. Frémont opposed the expansion of slavery. Buchanan called that position "extremist", warning that a Republican victory would lead to disunion, a then constant issue of political debate which had already been long discussed and advocated. The Know Nothings attempted to present themselves as the one party capable of bridging the sectional divides. All three major parties found support in the North, but the Republicans had virtually no backing in the South. Buchanan won a plurality of the popular vote and a majority of the electoral vote, taking all but one slave state and five free states. Frémont won a majority of electoral votes from free states and finished second in the nationwide popular vote, while Fillmore took 21.5% of the popular vote and carried Maryland. The Know Nothings soon collapsed as a national party, as most of its anti-slavery members joined the Republican Party after the 1857 Dred Scott v. Sandford Supreme Court ruling. 1856 also proved to be the last Democratic presidential victory until 1884, as Republicans emerged as the dominant party during and after the Civil War. As of 2023, this is the only time that the Democrats won the presidency without any electoral votes from New England and the only time that a Republican swept this region without winning the presidency. Nominations The 1856 presidential election was primarily waged among three political parties, though other parties had been active in the spring of the year. The conventions of these parties are considered below in order of the party's popular vote. Democratic Party nomination Democratic candidates: James Buchanan, Minister to Great Britain and former Secretary of State Franklin Pierce, President of the United States Stephen Douglas, U.S. Senator from Illinois Lewis Cass, Former U.S. Senator and 1848 presidential nominee from Michigan Democratic candidates gallery The Democratic Party was wounded from its devastating losses in the 1854–1855 midterm elections. Senator Stephen A. Douglas of Illinois, who had sponsored the Kansas-Nebraska Act, entered the race in opposition to President Franklin Pierce. The Pennsylvania delegation continued to sponsor its favorite son Buchanan. The Seventh Democratic National Convention was held in Smith and Nixon's Hall in Cincinnati,