Yeah, that's an interesting question. What's the deal with her? She used to be a "compassionate conservative" ten years ago.
The only inkling I ever had that she was crossing over to the Left was a Ben Stein article in which he mentioned being slightly puzzled that she seemed to be distracted or preoccupied and seemed also to be avoiding him.
I remember a show with her on Buckley's Front Line or Firing Line (?) in which she argued beautifully against feminism with one of those old bulldyke feminists. I was practically standing and applauding. She changed 180 overnight, it seemed.