I'm guessing his situation in Russia has deteriorated to the point where a US prison is preferable to staying in Russia. I'd say best case for him is 10 years in jail. Because there is almost no question that he broke the law; he will be arguing intent and conscientiousness.
His chief demand will likely be that the government not charge him under the espionage act, which is so broad and inflexible it would not even allow him to present a defense. No idea what other legal statutes he could be charged under, but whatever they are would have to at least allow the possibility of raising the "I did this in the best interests of the country, not the best interests of our military contractors and bureaucrats" defense.
Oh, and also that the trial will be a media circus and keep the NSAs surveillance programs in the news for the greater part of the next decade.
His chief demand will likely be that the government not charge him under the espionage act, which is so broad and inflexible it would not even allow him to present a defense. No idea what other legal statutes he could be charged under, but whatever they are would have to at least allow the possibility of raising the "I did this in the best interests of the country, not the best interests of our military contractors and bureaucrats" defense.
Oh, and also that the trial will be a media circus and keep the NSAs surveillance programs in the news for the greater part of the next decade.