If Miller takes the 5th she is openly stating she is her own source (IOW she made it up ala Jason Blair). Being a liberal and a "journalist" she wouldn't tell that truth about herself. What's more, the Times wouldn't want her to. They don't need another Jason Blair type of scandal. Since liberals all lie like dirty old rugs she could well be "protecting" herself and her employer with just one more tired liberal lie. If she never coughs up a source we can figure she made it up herself and there was no anonymous source.
What evidence do you have that Judith Miller is a liberal? (beyond the asumption that since she writes for the NYT she must be one).