I believe I read somewhere that Edward Snowden tried to express his concern over the extent of domestic surveillance to his boss at the NSA, and in response his

I believe I read somewhere that Edward Snowden tried to express his concern over the extent of domestic surveillance to his boss at the NSA, and in response his boss revoked his access to key systems. I can no longer find anything that indicates that. I also do not see it listed in this timeline. Does anyone know if Snowden went to his boss at the NSA before leaking to the Guardian? Also, I heard that Snowden posted a rant to a blog post about his concerns under his internet handle. I cannot find that anymore either.