It seems to be rather hard to actually cite this mountain of evidence without looking like a partisan hack.
That said, if you have this “plenty of evidence” please lay it forth at the feet of humanity very clearly. It would be tremendously valuable and conclusive.
In practice we have waving again and again with more hand waving and assurance on top. A heroic confabulation of nonsense.
The Veteran Intelligence Professionals for Sanity has members who have done good work for the public and the country. However, the memo referenced in your link did not even have the backing all the group's members and its arguments have been persuasively criticized.
https://en.wikipedia.org/wiki/Veteran_Intelligence_Professio...
But since you did bring him up, it reminded me that in July 2016, weeks after the DNC announced being breached, he publicly called on Russia to release information about Clinton. Candidate Donald J. Trump, verbally and in writing, called on a foreign government to interfere with the presidential campaign against his opponent; doing it in public doesn't make it okay.
"Russia, if you’re listening, I hope you’re able to find the 30,000 emails that are missing, I think you will probably be rewarded mightily by our press. Let’s see if that happens. […] By the way, they hacked — they probably have her 33,000 emails. I hope they do. They probably have her 33,000 emails that she lost and deleted because you'd see some beauties there. So let's see."
I don't think "collusion" is the right term for what he did (the attempts to access emails had started in March); I don't know what the right term is, I just know it's not okay.
>Russians hack DNC