To a woman and man, both Democratic presidential candidates pledge to bring our troops home. It is a question of when, not if. That’s cautious good news for the families of 160,000 U.S. military personnel in Iraq. But when are the estimated 130,000 military contractors leaving? That is nearly a one-to-one ratio of uniformed soldiers, sailors, pilots and Marines to non-uniformed mercenaries. Even if every private is pulled out of Iraq tomorrow, the U.S. would still have an army of rent-a-thugs on the ground.