Additionally the disclaimer that the author is working on the Sanders campaign should have come up front.
> For those who suspect that I’m a Clinton-hater, nothing could be further from the truth. I’ve written glowingly about Clinton many times and even gone so far as to call her “the most accomplished woman in American history.” Even with these recent revelations I’m about to disclose, I continue to stand by those words of praise.
I mean, you're not a Clinton hater, but that you are "working actively for" her opponent might be worth a mention in the same breath.
* Is independently supporting Sanders' campaign, maybe even volunteering.
* Is gainfully employed by a pro-Sanders PAC.
* Is gainfully employed by a something other than a PAC that is pro-Sanders.
* Is gainfully employed directly by the Sanders campaign.
* Something else
It isn't clear to me which of those is the case, but I assume it's the first. If he's actually employed by Sanders, that'd make his post a pretty odd thing to do. I think there are a lot better ways to have dealt with it (actually, I guess that's true either way).