"Liberal Republicans just can't win in New York anymore. And they
certainly can't out liberal Sen. Clinton"
I see this differently. Pirro can win because principled democrats and feminists will choose Pirro over clinton.
(Of course, the accuracy of this analysis is a function of the size of the principled democrats and feminists subgroup, which, at first glance looks like an oxymoron. ;) But I suspect that this subgroup does, in fact, exist, and can account for a 5-15% swing from clinton to pirro.)