The Know-Nothings were ________.
The Know-Nothing party was an outgrowth of the strong anti-immigrant and especially anti-Roman Catholic sentiment that started to manifest itself during the 1840s. A rising tide of immigrants, primarily Germans in the Midwest and Irish in the East, seemed to pose a threat to the economic and political security of native-born Protestant Americans. In 1849 the secret Order of the Star-Spangled Banner formed in New York City, and soon after lodges formed in nearly every other major American city.