What was the official name of the "Know Nothing Party"?

The official name of the "Know Nothing Party" was the American Party. This political organization emerged in the 1850s primarily in response to the rising wave of immigration, particularly from Ireland and Germany, and it was characterized by its strong anti-immigrant and anti-Catholic sentiments. The party's members often responded with the phrase "I know nothing" when asked about their activities, which led to the nickname "Know Nothing Party." The American Party sought to promote the interests of native-born Americans and often campaigned against perceived threats posed by immigrants to American society and politics. This context firmly anchors the American Party's identity and aligns with its founding principles during a period of significant social and political change in the United States.