posse comitatus

Constitutional sheriffs — an outgrowth of the white-nationalist posse comitatus movement — claim they are above federal and state government and are the ultimate arbiters of the law.

Related is the "constitutional sheriffs" movement, which also tries to make itself sound more official by using the name "posse comitatus."

Moreover, it is actually the first time on U.S. soil where the FBI and the Defense Department are collaborating on a program, which raises a whole bunch of other issues about posse comitatus.

Robert Tsai, a law professor at American University, has called the constitutional sheriffs organization a fringe group with roots in the far-right, anti-Semitic “posse comitatus” movement of the 1970s and 1980s.

How startling would any development have to be — a posse comitatus violation?