I’ve read the publicly released US-CERT report. What it does is describe a cyber intrusion of Democratic Party assets and individuals in technical detail, ascribe the techniques and tools used in the intrusion to entities believed to be (or affiliated with) the Russians, and recommend sensible, albeit standard, countermeasures to avoid, detect and mitigate similar future such attacks.
What the report does not do in any way, although certain news organizations and officials appear to imply that it does, is detail how any information thus gained in the attack was used to “interfere” with the recent election. It does not, for example, ascribe any of the damaging Wikileak documents, which were the documents that most appear to have had a damaging effect on the losing candidate, to the attacks that were subject of the report.
By the way, numerous open sources have been reporting that the Russians, PRC, DPRK, and even certain allies, have bee “hacking” U.S. Government, Commercial, public and private institutions for many years. Welcome to the occasionally alarming State of Awareness.