Based on our own research and a review of related work, we can confidently say that most domestic terrorists in the U.S. are politically on the right, and right-wing attacks account for the vast majority of fatalities from domestic terrorism.

Based on government and independent analyses, right-wing extremist violence has been responsible for the overwhelming majority of fatalities, amounting to approximately 75% to 80% of U.S. domestic terrorism deaths since 2001.