Could the Libby trial lead to impeachment?

How is it possible that a Republican-controlled Congress impeached President Bill Clinton over his attempt to conceal marital infidelity but that a Democratic-led Congress will not even consider impeaching this president for far more serious transgressions against the public trust? That is the question that arises from early revelations in the trial of Lewis "Scooter" Libby, Vice President Dick Cheney's former chief of staff. This case's importance lies not in the narrow charge that Libby committed perjury in testifying about his role in the outing of CIA operative Valerie Wilson; that was merely one facet of a far-ranging plot to deceive Congress and the public about perhaps the most important issue of our time: the prospect of terrorists obtaining a weapon of mass destruction. The Libby case testimony, centered on the chicanery of the vice president, certainly suggests that impeachable offenses occurred at the highest level of the White House. Just how conscious the president was of the deceits conducted under his authority, what he knew and when he knew it, is precisely what an impeachment trial would determine.