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Know Nothing
Other nameNative American Party
American Party
First LeaderLewis Charles Levin
Founded1844
Dissolved1860
Preceded byWhig Party
Succeeded byConstitutional Union Party
HeadquartersNew York City
Secret wingOrder of the Star Spangled Banner
IdeologyAmerican nationalism
Anti-Catholicism
Nativism
Republicanism
Right-wing populism
White nationalism
ReligionProtestantism colors=     Red      White      Blue

The Know Nothing movement, formally known as the Native American Party, and the American Party from 1855 onwards, was a nativist political party and movement in the United States, which operated nationwide in the mid-1850s. It was primarily an anti-Catholic, anti-immigration, and xenophobic movement, originally starting as a secret society. The Know Nothing movement also briefly emerged as a major political party in the form of the American Party. Adherents to the movement were to simply reply "I know nothing" when asked about its specifics by outsiders, providing the group with its common name.

Supporters of the Know Nothing movement believed that an alleged "Romanist" conspiracy was being planned to subvert civil and religious liberty in the United States, and sought to politically organize native-born Protestants in what they described as a defense of their traditional religious and political values. The Know Nothing movement is remembered for this theme because of fears by Protestants that Catholic priests and bishops would control a large bloc of voters. In most places, the ideology and influence of the Know Nothing movement lasted only a year or two before disintegrating due to weak and inexperienced local leaders, a lack of publicly declared national leaders, and a deep split over the issue of slavery. In the South, the party did not emphasize anti-Catholicism as frequently as it did in the North, but it became the main alternative to the dominant Democratic Party.

The collapse of the Whig Party after the passage of the Kansas–Nebraska Act left an opening for the emergence of a new major political party in opposition to the Democratic Party. The Know Nothing movement managed to elect congressman Nathaniel P. Banks of Massachusetts and several other individuals in the 1854 elections into office, and subsequently coalesced into a new political party known as the American Party. Particularly in the South, the American Party served as a vehicle for politicians opposed to the Democrats. Many also hoped that it would stake out a middle ground between the pro-slavery positions of Democratic politicians and the radical anti-slavery positions of the rapidly emerging Republican Party. The American Party nominated former President Millard Fillmore in the 1856 presidential election, although he kept quiet about his membership, and personally refrained from supporting the Know Nothing movement's activities and ideology. Fillmore received 21.5% of the popular vote in the 1856 presidential election, finishing behind the Democratic and Republican nominees.

The party entered a period of rapid decline after Millard Fillmore's loss in the 1856 election, and the controversial Dred Scott v. Sandford decision made by the Supreme Court in 1857 further galvanized opposition to slavery in the North, causing many former Know Nothings to join the Republicans. Most of the remaining members of the party supported the Constitutional Union Party in the 1860 presidential election, which subsequently lost to Abraham Lincoln of the Republican Party, and said defeat ultimately led to the final dissolution of the Know Nothing movement that same year.

History