b) If he has given aid or comfort to enemies, then you should be able to name those and state the aid and/or comfort given them.
If you can spin either of those into a charge that will hold up in court, I'll be impressed.
Had he stopped at saying "The US government is spying on its own citizens!" you might have a point. But he told the Hong Kong press that the US was spying on both Hong Kong and China. You could make a legal case that informing China of this secret information was "giving them aid". It certainly weakened Obama's "Stop hacking us and stealing our stuff! We're victims of agression!" argument to Xi. And whether you like/agree with Snowden or not, and I for one do not, he admitted stealing 4 laptops full of data that I am 100% sure his employment contract denied him the ability to take. Whether he's found guilty of treason or not is unsure. My gut feeling is he'll beat that charge, if he ever faces it. But he will for sure be convicted for taking the 4 laptops with him. It'll be interesting to see what happens. Some analysts think that China will just let the Hong Kong courts handle this and live with their decision. I think it will be tied up in the courts for years in Hong Kong. He'll ask for political asylum and those cases take many years to resolve.