"It's possible, but Judith Miller didn't write anything about this issue. She was just pulled in for talking to the source to ask about "other issues", according to the prosecutors. My guess is that she was brought in to ask her what other security information Plame was passing to her."
Miller was pulled in because she had a conversation with someone at the WH on this subject on July 6th--the date of the Wilson editorial.
Fitzgerald knows who she talked to, he wants to hear what she says she said to them. That is what Miller is hiding.
Odds are, given the date, Miller was the first to tell anyone at the WH about Plame. And Fitzgerald wants to know where she got the info.
Given Miller's extensive contacts from her long work on the WMD issue (she's written books about it, you know), it could have been anybody. But NOT Rove or Libby.