1) The Americans do not listen to other agencies and countries. Except Israel and Arabia who can publicly pay the politicians to get deals.
2) The American agencies like to mess thing up, so they can ask for more funding.
3) The NSA already knew this, because they track and scan every packet. They did not find any problems with the hacks.
4) There were leaks in the DNC after Bernies loss. And DNC system was already infiltrated by AWAN brothers (system administrators of DNC with criminal activities).
Problem with the "hacks/collusion" in general: The Russians did not corrupt Hillary's brain to use her powers against Bernie. Not did they pay Trump to be as he is. I am afraid the US is shooting itself in the foot and blaming Russia for its own political problems (hint: it is corruption).
For me, as it is my home-country, the hardly-ever-heard-of Dutch intelligence agency, seem to want to have a bit of fame for their work in 2015.
Oops. Sorry when I seem disrespectful towards the agencies. I love them. Especially my special NSA guardian ;-)