Prominent members of the opposition Democratic Party in the United States are calling for an independent investigation into new allegations surrounding the case for war in Iraq. Two White House officials are said to have illegally disclosed to journalists that Valerie Plame, the wife of former diplomat Joseph Wilson, was an agent for the Central Intelligence Agency. It is alleged that this was an act of revenge because Wilson had accused the Bush administration of exaggerating the case for war against Saddam Hussein. Democratic presidential hopefuls Howard Dean and Wesley Clark said a special investigator should be appointed. Although the Department of Justice is looking into the matter, some have expressed concerns that it could come under political pressure.