A case for impeachment:

If deceiving the country into war isn't 'high crimes and misdemeanors,' what is?

... 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.