Ok,
https://www.law.cornell.edu/uscode/text
(5) the term domestic terrorism means activities that
(A) involve acts dangerous to human life that are a violation of the criminal laws of the United States or of any State;
(B) appear to be intended
(i) to intimidate or coerce a civilian population;
(ii) to influence the policy of a government by intimidation or coercion; or
(iii) to affect the conduct of a government by mass destruction, assassination, or kidnapping; and
(C) occur primarily within the territorial jurisdiction of the United States.
They are the shock troops of the Deep State.
"Combinations too powerful to be suppressed by the ordinary course of judicial proceedings, or by the powers invested in the Marshals by law" is what they are.
Haven't I heard that phrase somewhere before?
The President should act accordingly.