The KGB has nothing to do with the hacking of the g-mail accounts so much favored by many of the high officials and all their official and unofficial advisers. G-mail was broken open quite a while ago, and Wikileaks was right in believing this was “too easy”.
Warning: Do NOT be picking a fight with the Russian Federation, and for sure, not over this. The Russians may not be Communist any more, but they are still Russians.
What does Russia have to do with the investigation being reopened? The FBI found this from the Weiner investigation.