And also as old as the hills but it usually is told about milking a bull.
Call it a sneaking suspicion, but I don't think the First Lady has GWB's backbone (in the sense of ability to shrug off the liberals' hatred). I think she's trying to carve out a subtle distinct identity for herself, even at her husband's expense. It would not surprise me if we saw and heard more of this kind of thing from her, as a means of asserting herself as a "modern woman," and as a means of protecting herself from the left's hatred of George.