It started with the WashPo story[0] on the DNC hack and the CrowdStrike attribution (there were some good rebuttal stories at that time, I think they have changed their minds) and now you have 10-15 different sources kicking this story further down the road each day.
That's how journalism is changing - rather than having 2-3 investigative reporters at one newspaper do a one year investigation then publish their in-depth series (pass go, collect pulitzer etc.) the large stories are now often broken down piecemeal and worked on in public over time.
It means many more experts can work on it and the stories are better for it - but the downside is that they're very difficult to keep track of (the only way is Twitter or reddit, IMO - and the netsec reddit is horrible with approving stories). If you come into it part way you can feel lost because the writers assume you've been following along (which is a mistake)
I've honestly probably read 100+ stories on this thread, likely more. At this stage you need to bring the thread back together yourself with Google or starting with the Wikipedia pages[2][3]
[0] https://www.washingtonpost.com/world/national-security/russi...
[1] https://www.crowdstrike.com/blog/bears-midst-intrusion-democ...
[2] https://en.wikipedia.org/wiki/Democratic_National_Committee_...
[3] https://en.wikipedia.org/wiki/2016_Democratic_National_Commi...