I think this is a trial balloon and Holder is acting as a stalking horse for the Obama administration. They're setting up to pardon him if the public approves.
https://www.propublica.org/special/sealing-loose-lips-charti...
This is the last official statement AFAIK and the language is surprisingly sanguine. http://time.com/3974713/white-house-edward-snowden-petition/