On the recordDecember 1, 2011
So the law, at least since 1942, by the Supreme Court has been that if someone decides as an American citizen to join forces with enemies of the United States, they have committed an act of war against their fellow citizens. It is not a criminal event we are investigating or dealing with; it is an act of war, and the American citizens who helped the Nazis were held as enemy combatants and tried as enemy combatants?
Source
govinfo.gov
