...The ad hits Murtha for his repeated smears of the Marines in Haditha. Rather than wait for an investigation and a court-martial to determine what happened, Murtha pronounced the accused Marines of war crimes, as the clip shows. Why? He opposed the war and tried to exploit the Haditha tragedy for political purposes. That's about as craven as it gets, and the collapse of the charges against the Marines involved demonstrate Murtha's culpability...