If you read the last indictment, you will see two things that really stand out. The first is that Trump and his supporters who are babbling "Where's the server" are totally full of crap, because first of all, e-mails are not really the crux of the crimes denoted although the accusation is there, and second of all, asking that question is like asking "where's the house" when you know where the mailbox is and it's all registered mail. It's a moot point. We can trace messages to and from an IP address, we don't need a hard drive.
The second thing you will see is that the connections made between these individuals and their crimes are well documented in the indictment. We have records, money, communications, receipts, pretty much everything necessary for a full conviction, let alone an indictment. These people did it unless the indictment is a complete fabrication from whole cloth. "It" in this case is setting up a US operation to disseminate both false and stolen information and to obscure the real source and value through identity theft, money laundering, and wire and bank fraud. The intended result was pretty obviously to sew dissent and division in an attempt to damage Hillary. Now as to their connection to the Russian government, these are for the most part known operatives, and their travels are documented. Putin himself said something to the effect that we can question them when he can question our spies in Russia. That is really not even a question.
Now that we have pretty well established a conspiracy to alter the results of a US Presidential election (by nearly all accounts not successful, but still a criminal attempt) we come to the part that anyone but a buffoon like Trump would be pointing to instead of calling our domestic institutions incompetent or mistaken. That is the clear statement in the indictment that any and all Trump supporters and campaign workers in the Trump organization who cooperated directly with these people did so without knowledge of their true identity. This is what he should be pointing to, but that should be here at home. In Helsinki he should have reiterated the US position that Russian operatives carried out covert operations with the intent of interfering in our election, nothing more. He most certainly should not ever offer up the excuse of the dictator standing next to him as a statement of his policy or position. Never. Period. Putin was there and could have said whatever he wanted in response.
As to how bad a debacle this is, we will see. It absolutely is not something that is just going to be sloughed off as a "Trumpism". It is a major misstep and it makes him and our intelligence services look worse than bad. It shows that he is so concerned with his own image that he will go to any end to defend himself, even taking the side of a Russian dictator over us. Maybe the worse part of that is that he is a dismal failure even at that.
Here is the indictment. If you haven't read it, you probably should. As I said months ago, I think we will eventually find procedural violations within the Trump organization, but not clear-cut collusion with Russia. So far, that has been the case. Hopefully this will run it's course soon, it's time for Mueller to put up or shut up.
https://www.justice.gov/file/1080281/download