Even though it may not seem like it, domestic terrorism, particularly built around white supremacy, is nothing new. Given that racism is our nation's original sin, it should not be surprising that in the post Civil War period, the historical efforts to deal with the Ku Klux Klan are both instructive in their own right, but at the same time foreshadows the thru lines that lead us to where we are today.

This is the story that the Washington Post’s Charles Lane shares in his book Freedom's Detective: The Secret Service, the Ku Klux Klan and the Man Who Masterminded America’s First War on Terror.

My conversation with Charles Lane: