This Jonathan Chait piece in the New Yorker is worth a read. He goes over all the public information we know about Russia's involvement in our election and with Trump in particular.
First of all, it's great to have this all in one narrative. Secondly, after you read it (it's lengthy), you cannot possibly believe the old "no collusion" chant. And finally, when you realize that Bob Mueller has much more that we don't publicly know yet, it's very possible that we could be facing a worst-case-scenario.
What will happen if Trump really did work with our adversary to steal an election?
There's a word for that, and it's not collusion. It starts with a T.