I restrict my definition to investigative reporting and neutral reporting of current affairs. People who write op-eds, or engage in propaganda, or (in this case) are an outlet for strategically timed leaks by foreign governments, coordinated beforehand with said outlet - that's not journalism, whatever else it happens to be.

The evidence of Russian collaboration is detailed in the Mueller indictment, numerous investigative pieces about e.g. the kinds of people who visited Assange in the embassy, the obviously coordinated timing of DNC leaks, etc. etc. A preponderance of available evidence, let's call it.