a. the Grand Dragon of the Ku Klux Klan
The 100 Percent American group is a nativist group who promoted the idea of what it means to be an American. They believed that white people with western European origins (original settlers) were the rightful Americans.
Nativist groups were against immigrants, blacks, Jews, Catholics, and other minority groups. They used methods of intimidation and violence in an effort to limit the power and say of these groups. The KKK is an example of a group that organized around the ideas of nativism and promoted what they believed to be the traits of "true" Americans.