Of course they are denying it. Wouldn't want the GOP having to eat that nasty crow pie again on GW's account, would they? But the proof is there. Now there has to be video marking this event. It'll show up soon enough.
My hat's off to First Lady Laura Bush. She seems to be in disagreement with the GOP and her husband. She said, "I don't think there's anything wrong with singing it in Spanish," during a CNN interview yesterday.