In order to reach the level of "High confidence" there needs to be well documented evidence. This evidence will be reviewed by others. We'll see. As an FYI, you may be wise to start coming up with reasons why Putin interfering with the American election (and the word is now House seat elections were also targeted) isn't a big deal.
It's quite amusing (though somehow I think you'll not find it funny) how the US spokespeople and intelligence creeps choose their words so carefully to fool Americans.
Take John Kirby for example. At the 2.45 he makes the claim that Russia "interfered with the US election". Yet the only evidence of this is that RT news criticised Hillary Clinton ( or something equally benign).
I'd say that is the entire extent of any evidence they have on anything. But by framing things the right way and by choosing their words carefully, they enable people who want to be deceived that that have evidence of hacking.
[YOUTUBE]https://youtu.be/SUDXV66-n64[/YOUTUBE]