I would imagine, given her comparisons of those who voted against gay marriage in Maine to Nazis that she is referring to Godwin's Law, which was originally formulated by Mike Godwin in 1990. It states
As a Usenet discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches 1.The term Godwin's law can also refer to the tradition that whoever makes such a comparison is said to "lose" the debate.
And it is exactly the sort of over the top rhetoric of those like Cooke that led Godwin to formulate the law to begin with. He is not, as Cooke rather defensively suggests, a Nazi sympathizer. Quite the opposite. The purpose of the law is to try, far too often unsuccessfully, to get those who trivialize the Holocaust by comparing anyone they disagree with to Nazis, to reconsider. While I am unhappy that gay marriage lost in Maine, I would not compare it to the murder of six-million Jews, as well as a number of other people by the Nazis.
But then again, I don't share Cooke's often extreme views on a number of points.