The intelligence community released its unclassified assessment of Russian hacking activity today. However, anyone who was hoping to learn more about how they collected their information will be sorely disappointed. There's none of that at all. It's just a series of assessments, and you either believe them or you don't.
If you want to read the whole report, we have it here. Oddly, it includes a lengthy annex about the actions of the RT television network, which is a public organ of Russian influence. But RT probably played virtually no role in the 2016 election. The real damage was done via email hacking, and helped along by anonymous twitter trolls who spread ugly anti-Hillary memes. Placing that much weight on RT really makes no sense, and I don't know why they did it.
In any case, if you don't want to read the whole thing, the executive summary is below. The intelligence community seems pretty sure that (a) Putin directed the influence campaign, (b) he did it to discredit Hillary Clinton, (c) Russian military intelligence carried out the hacking and relayed information to WikiLeaks, (d) they also hacked Republican sites but didn't make any of it public, and (e) this all worked really well, so Russia will probably do it again.
Donald Trump, of course, brushed it all off. Minutes after meeting with the intelligence chiefs and hearing the classified version of all this, he released an obviously prewritten statement saying that lots of countries try to hack us; it had absolutely no effect on the election—zilch, Zero, NADA, NOTHING!; and from now on we shouldn't talk about any of this publicly because we don't want to give anything away to our enemies.
Seriously. That's what he said.