From the article:
A report detailing Russia's interference in the 2016 election as well as cyber attacks in previous election cycles would be delivered to Congress in the coming days, he added.
This is the report:
I only read a few pages on how the unnamed (coughdemocratscough) party's security was compromised, but I think that the report is probably genuine and accurate. It fits the bill of a very typical narrative: your network's security is only as strong as the people using it. There have been some absolutely stellar "spear phishing" campaigns that I've seen recently in my university email inbox, I couldn't help but applaud at the level of effort. Many people definitely got got, because on several occasions, the director of our IT department would send out a very special email of thinly-veiled rage. One sympathizes.
I've been wishing US intelligence agencies would put up or shut up ever since the news broke. This is a nice start, but I'm not sure that 13 pages is enough to close the case.