For it to be treason evidence would have to show that Snowden acted on behalf of a foreign power. Espionage requires that Snowden acted as a spy and gave or sol

For it to be treason evidence would have to show that Snowden acted on behalf of a foreign power. Espionage requires that Snowden acted as a spy and gave or sold secrets to another party (presumably not a foreign power or adversary). Snowden gave his vetted information to an American journalist and a British journalist. You would have a hard time making either charge actually stick. But I'm certain the US government would ruin his life thoroughly regardless.