In the last 10 years, 73% of all domestic extremist-related killings have been by right-wingers, compared to 23% by jihadi's and 3% by left-wingers."; Last year, domestic extremists killed at least 50 Americans and every killer had ties to at least one right-wing extremist movement. White supremacists did most of the killings. The number of terrorist attacks by far-right wingers more than quadrupled between 2016 and 2017.