Sprinkling a little Twitter pixie dust on an infographic doesn't make a pure politics story germane to HN. Flagged. Please do likewise.
We saw a rare opportunity to apply technology to something it doesn't normally get to be applied to. Seems pretty germane to HN to me.
This isn't a value judgement on your infographic. It's just the wrong venue for it.
I'd think the relevance of the venue is determined by the level of comments and votes from the audience, the beauty of social sites. While I agree it doesn't follow the typical content of HN, if the audience up-votes then so be it.