WASHINGTON THE BIGGEST threat to the new legitimately elected political leadership in Iraq is the very force that did so much to make it possible -- the American military. The biggest threat is not an Iran-style theocracy ruthlessly imposed by the majority Shi'ites and triggering civil war. US officials who are involved in the grunt work of trying to help a democratic Iraq emerge confided over the weekend that they have had more than enough dealings with people from the majority community to be positive on that score. It will take hard work, but officials note that too many Iraqi...