As I said before, if the goal of the alleged "Russian interference" in US elections is to destroy confidence in the process, then they don't have too much work to do other than rub the US public's nose in the shit that the electoral process happens to be. Whatever "Russian interference" that may have existed pales in comparison to all the shenanigans that are considered SOP in US elections. The level of damage caused by "Russians" is unquantifiable.
On the other hand, the institutions and institutional practises that led to Clinton "losing" the election tend to be mostly home grown, which is what the "hacked e-mails" demonstrated. Although, it is questionable as to whether the e-mails were really hacked, or leaked by someone disgusted with DNC violations of its own rules. Additionally, Clinton only "lost" in the electoral college, an institution which is intended on thwarting democracy and democratic process. That is the obvious cause for her "defeat" while having one of the largest margins of the popular vote.
In fact, that is the main problem with the "Russian Interference" allegations: Clinton didn't lose by the standards of most democratic systems. Instead, Clinton lost because of an anachronistic, anti-democratic institution created by the US Constitution. It is an institution that most people don't understand.
The letter that former FBI Director James Comey sent to Congress on Oct. 28, 2016, and the subsequent media firestorm over it was an event that could also have contributed to Clinton's "loss". The impact is relatively easy to measure because it was the biggest news event in the final two weeks of the campaign, and we can compare polls conducted just before the Comey letter to the ones conducted just after it.
Is James Comey under indictment?
As I understand it, Russian attempts at influencing the US election consist of the hacking incident, which the Democrats assured us was not an issue: until they lost the election. They also consist of trying to show Clinton as being dishonest and otherwise discredit her. That's another one of those things which is amazingly easy to defend against! Just play one of the many tapes of Clinton contradicting herself.
Anyway, there are a lot of other explanations for why Trump is president which are far more credible and substantial than Russian interference. Any defence attorney worth their pay can blow this one out the stadium with little effort.
You also have to remember that the standard for burden of proof in a criminal conviction is "beyond a reasonable doubt", or "that no other logical explanation can be derived from the facts except that the defendant committed the crime, thereby overcoming the presumption that a person is innocent until proven guilty."
I have yet to see that non-US actions caused Clinton's loss or that any "foreign interference" went beyond that standard.
I think US resources would be far better spent on addressing the internal problems than trying to place fault on things which probably didn't effect the outcome at all.