Senate Judiciary Committee chairman Patrick Leahy has a message for Karl Rove: You may be leaving, but we're not finished with you yet.

In a statement following word of Rove's resignation, Leahy noted that Rove -- at the president's insistence -- has failed to comply with a subpoena requiring him to testify about the firing of a slew of U.S. attorneys last year. He said it's all of a piece.

"Despite evidence that he played a central role in these firings, just as he did in the Libby case involving the outing of an undercover CIA agent and improper political briefings at over 20 government agencies, Mr. Rove acted as if he was above the law," Leahy said.

Leahy said he wants to know what Rove and the White House are "so desperate to hide" and vowed that the Judiciary Committee would continue its investigation into Rove's role in the prosecutor purge. He said that there's a "cloud over this White House," and that it will follow Rove even as he walks out the door.