The chairman of the US Senate Armed Services committee said he was leaving Wednesday and for Iraq to tell its leaders that they must accept responsibility for their country. "Folks, if you want a civil war in this country, that's your choice. Count us out of your civil war. We've been here four-and-a-half years," Democratic Senator Carl Levin of Michigan told reporters Wednesday during a stop at Michigan's statehouse. Levin's comments came as the death toll rose to 250 following a spate of four suicide truck bombings in northwestern Iraq Tuesday, underscoring the difficulties in curtailing the steady stream of shooting and bombings that have become the soundtrack to Iraq's reconstruction efforts.