It was only a matter of time before some leftist group tried to pull this one. There is nothing wrong with political operatives and so-called dark money groups bankrolling ads, conducting opposition research, and being overly partisan. We have similar outfits on our side that do the same thing. I respect left-leaning groups and publications more if they are overt about their bias; the UK’s Guardian newspaper is a prime example. Yet, as the Daily Caller News Foundation discovered, it’s an entirely …