Russia hacking the election
directly, as in accessing voting machines, tabulating machines, etc and then altering the results? I don't think there's any evidence for that at all I don't think any such thing happened (it's basically flat-earth, or fake moon-landing level nuttiness afaik) - and while there's certainly spin in that direction, I don't think the US government or Democratic party ever claimed it either.
Russia hacking the election, via directly breaking into DNC servers, and then that material showing up at disadvantageous times for the Clinton campaign? The evidence of
that was both public and pretty definitive back last summer; here's Cloudstrike's bit on it:
"Bears in the Midst: Intrusion into the Democratic National Committee", and here's Bruce Schneier's post on the subject:
"Russian Hack of the DNC" - both sites have plenty of links to take you down to whatever level of resolution you prefer (and your time and skillset allow).
And on the subject at hand... unsurprising, awful, illegal, and all part of expected business as usual in Trumpland (all the way down to the backstabbing and completely lack of loyalty or even a united front).