Secret whistle blowers waiting in the wings

Apparently, Sen. Patrick Leahy told Keith Olbermann that he may have some secret whistleblower witnesses waiting in the background to testify about the US Attorney purges if they're needed.

Olbermann continued, "I'm wondering what we should infer from that. Are there rabbits in hats that you have that we don't know about?"

"Keith, I was a prosecutor for eight years," Leahy said. "I've always tried to have a few witnesses honing back in case we need them and I suspect we will have them."

Perhaps they're trying to get Rove into a perjury trap. That's probably why the White House won't let him testify under oath.