I saw one interview where she was talking about that. I can’t remember exactly what she said, but it was something I took to mean she wasn’t ready to throw her support behind anyone in the field yet. And why would she since she hasn’t ruled out a run herself yet?
I consider myself a fairly good people reader. When Sarah made that statement, I could see that she was saying what she had to say to keep the curtain drawn on her strategy.
It's a tough balancing act, but she's played it masterfully, so far.