The president of the United States benefited from Russian interference
Let's test this one. As I understand it, "The Russians" are said to have "interfered" in our election in 3 ways.
1. Facebook ads.
https://www.huffpost.com/entry/russian-facebook-ads-divide-americans_n_5af46067e4b0859d11d121f4
House analysts noted the ads fit within a well-defined set of categories, all of which touch on the most divisive political topics of our time. The posts played both sides of the debate on subjects like immigration, gun control, political candidates and veteran affairs.
The ads would also simultaneously bolster certain communities’ online presence on one hand, while encouraging detractors to attack that same community on the other. They targeted divisions along racial and religious lines, in addition to LGBTQ issues.
If the ads play both sides of hot button issue, how can they be said to benefit Trump? Especially exclusively? Consider this...
What we found in Facebook ads by Russians accused of election meddling
- Only about 100 of the ads overtly mentioned support for Donald Trump or opposition to Hillary Clinton. A few dozen referenced questions about the U.S. election process and voting integrity, while a handful mentioned other candidates like Bernie Sanders, Ted Cruz or Jeb Bush.
Keep in mind, that 100 is out of over 3,000 ads total.
2. Hacking emails
The government doesn't stand by any of this claim.
"DISCLAIMER: This report is provided “as is” for informational purposes only.
The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service referenced in this advisory or otherwise. This document is distributed as TLP:WHITE: Subject to standard copyright rules, TLP:WHITE information may be distributed without restriction"
https://www.us-cert.gov/sites/default/files/publications/JAR_16-20296A_GRIZZLY STEPPE-2016-1229.pdf
We assess with high confidence that Russian military intelligence (General Staff Main Intelligence Directorate or GRU) used the Guccifer 2.0 persona and DCLeaks.com to release US victim data
Whatever "high confidence" means, it doesn't mean the government says it's true... From the bottom of page 13
"High confidence in a judgement does not imply that the assessment is a fact or a certainty; such judgments might be wrong."
I read an article from the NYT, I believe, and of course I can't find it now, but it had a line in there that said identifying a hacker is more of an art than a science. The above quotes seem to suggest the same thing. Often there is no proof and a lot of guess work.
So Russia may not even have hacked the DNC. And since the DNC didn't turn over their servers, that could not have helped identify the culprits.
If Russia didn't hack the DNC, they didn't give the emails to Wiki leaks and cannot be said to help Trump in that way either.
3. Disseminating documents directly
I know of only one example of "Russians" injecting information into the campaign directly. Not the Trump Tower meeting, as far as I know, no Russians gave information to the Trump campaign at that meeting- but the Steel dossier. The Steel dossier the NYT now says contains "Russian disinformation"
Another possibility — one that Mr. Steele has not ruled out — could be
Russian disinformation. That would mean that in addition to carrying out an effective attack on the Clinton campaign (

),
Russian spymasters hedged their bets and placed a few land mines under Mr. Trump’s presidency as well. Oleg D. Kalugin, a former K.G.B. general who now lives outside Washington, saw that as plausible. “Russia has huge experience in spreading false information,” he said...Last year, in a deposition in a lawsuit filed against Buzzfeed, Mr. Steele emphasized that his reports consisted of unverified intelligence.
Asked whether he took into account that some claims might be Russian fabrications, he replied, “Yes.”
Mueller Report Likely to Renew Scrutiny of Steele Dossier
Even if you think what the NYT says is true (and you shouldn't

) here, Russians are working to benefit both Trump and Clinton. AG Barr all but confirmed that.
Cornyn to Barr: How Do We Know That The Steele Dossier Was Not A Russian Disinformation Campaign?
CORNYN:...Can you state with confidence that the Russian--that the Steele dossier was not part of the Russian disinformation campaign?
BARR: No, I can't state that with confidence and that is one of the areas that I am reviewing. I am concerned about it and--and
I don't think it is entirely speculative.
So there's another example of Russians harming Trump's chances, and helping Hilary's. And remember she indirectly paid for the dossier.
It's possible I'm missing something, but as it stands now, I'm not convinced Russia was working to help Trump.