" The GRU gathers human intelligence through military attaches and foreign agents. It also maintains significant signals intelligence (SIGINT) and imagery reconnaissance (IMINT) and satellite imagery capabilities." GRU Space Intelligence Directorate has put more than 130 SIGINT satellites into orbit. GRU and KGB SIGINT network employed about 350,000 specialists." GRU wiki
Let us assume for the sake of argument that the Mookster preppie fellow had it right and that the Rooshans collected (hacked if you wish) their way into the DNC to scoop up the correspondence that has "done in" Debbie W-S. I would expect that this "lovely" stuff (from the intelligence perspective) would have been passed to WikiLeaks after laundry service had been done on it through several cut-outs. It is unlikely that there was a pleasant luncheon "pass" at Tatiana's Tea Room in Kensington. It is quite possible that Assange has never been forced to acknowledge the original source, even to himself. Cool!
What is the chance that Assange has in his paws a lot more goodies like the DNC e-mails? I would estimate the chance to be around 150% and they are probably not the sum total of the SIGINT products possessed by the collector.
When can we expect to see more of the "take?" Well, pilgrims, I would expect the "hammer" to drop unpredictably but effectively after HC is nominated. The Democrats will by then be fully committed to HC's candidacy and a roll-out of various interesting bits of news would devastate her effort.
Is "Trump is a Russian Agent!" likely to be an effective defense? I doubt it. Such a Mookian meme contains the awful defect of the absence of a credible denial of the veracity of the e-mails. One could claim some are false, but which ones? Comey has told us under oath that her handling of classified information was "extremely careless."
Sooo, if the Russians did it, (and there are many other possible collectors) who in particular did it? I vote for the GRU. I used to know them well. They could do this "without breaking a sweat." This kind of thing is one of their core missions. pl