Since Bollman, the few treason cases that have reached the Supreme Court were outgrowths of World War II and have charged adherence to enemies of the United States and the giving of aid and comfort. In the first of these, Cramer v. United States,1484 the issue was whether the “overt act” had to be “openly manifest treason” or if it was enough if, when supported by the proper evidence, it showed the required treasonable intention.1485 The Court, in a five-to-four opinion by Justice Jackson, in effect took the former view….
They "can't", or they are not supposed to are completely different things. I've turned off automatic updates.