What was the main concern of the know - nothing party?

The main concern of the Know-Nothing Party, which emerged in the 1850s, was the perceived threat posed by Immigration, particularly from Catholic countries, to American society and values. The party advocated for nativist policies, promoting the interests of native-born Americans and seeking to limit the political power and influence of immigrants. They were also wary of the growing influence of Catholicism in a predominantly Protestant nation. Their secretive nature and emphasis on "American" identity led to their nickname, as members would often respond "I know nothing" when asked about their activities.