After Snowden's in prison, do the same to those whom have aided and abetted the release of such information - including those at the Washington Post(if the NSA does its job right, that newspaper should have wished that it had done the right thing by not publishing national secrets).
Given the evidence that he not only broke his trust to keep secrets, he also did so in a manner that harms this country entirely. If there should be any pardons and praise, they are to be reserved for anyone who may be prosecuted in bringing Snowden to justice. In addition, reward and protect them from any retaliation that may occur from any Snowden fanatics.
Of course, this won't all go well with those that worship Snowden as some idol and not rightfully consider him as a betrayer of one's country. However, I do not recognize any value in destroying the country or ensuring that it cannot protect itself from threats within and without.
Harmed the country or harmed the Administration? Which is the greater harm: revealing to our enemies that they are being spied on or hiding from every American that they are being spied on?