Via The Huffington Post:

Former White House Press Secretary Scott McClellan was one of the key figures in the Bush administration's efforts to respond publicly to the investigation into the Plame leak. He spoke for the White House and he was the filter through which the public learned about which officials were and were not involved in the leak. Standing in front of the White House Seal, McClellan famously denied any White House involvement in the leak, "If anyone in this administration was involved in it, they would no longer be in this administration."

We need to launch an immediate investigation to determine the facts of this case, the extent of any cover up and determine what the President knew and when he knew it. If in fact the President of the United of States knowingly instructed his chief spokesman to mislead the American people, there can be no more fundamental betrayal of the public trust. Read on...