It's still a joke. Even if he is Russian (which is a very convenient boogieman), the fact is he DID expose corruption in US parties.
He may be partisan, he may not be revealing damaging info about Russia. But if the information is true, so what? Shouldn't we be doing something about the corruption he revealed regardless of why he revealed it? I can't believe all you have to do is say the R-word and suddenly people are just willing to ignore everything he says, its ridiculous. Like uhh enemies of the US are more likely to expose damaging information about them as compared to allies, no shit?