The latest liberal line on this is, "Why hasn't Trump expressed his outrage?" I guess that's supposed to serve as some sort of proof that he must have been in on it. I eagerly await their statements of satisfaction when Trump tweets, "How dare the Russians help me win!"
But really, there's not a lot here we hadn't figured out a long time ago. Putin hates Hillary, probably because she's a liar and a horrible human being, and didn't want to have to deal with her. He probably also viewed Trump as an amateur he'd be able to roll, but I think it was more about his extreme disdain for Hillary and the expectation that there would be no real way to deal with her because you can't believe a word she says.
Anyway, if the Post is to be believed (big if, for sure), Obama had detailed information about this 10 months ago, and that included fairly damning evidence that Putin personally ordered it all to happen: