FALLON, Nev. - Former President Jimmy Carter said Wednesday major policy changes are needed because the Iraq war has divided the nation "almost as much as Vietnam."

"So there's no doubt that our country is in much more danger now from terrorism than it would have been if we would have done what we should have done and stayed in Afghanistan," he said on the campaign trail with his son, Democratic U.S. Senate nominee Jack Carter.

The former president said the Bush administration made a "terrible mistake" by invading Iraq and diverting troops from Afghanistan.

Jack Carter criticized his opponent, Sen. John Ensign, R-Nev., for supporting the Iraq war. Both Carters also said Defense Secretary Donald Rumsfeld should go.

"I think he's one of the worst secretaries of defense we've ever had," the former president said of Rumsfeld. "Almost every decision he has made has aggravated his military subordinates and has also proved to be a mistake."