WASHINGTON (AP) - President Bush and the Democratic-controlled Congress lurched toward a veto showdown over Iraq on Wednesday, the commander in chief demanding a replenishment of war funding with no strings and Speaker Nancy Pelosi counseling him, "Calm down, take a breath." Bush said imposition of a"specific and random date of withdrawal would be disastrous" for U.S. troops in Iraq and he predicted that lawmakers would take the blame if the money ran short. "The clock is ticking for our troops in the field," he said. "If Congress fails to pass a bill to fund our troops on the front...