There must have been times when Gen. David Petraeus and Ambassador Ryan Crocker thought they were back in embattled Sadr City when they faced Democrats on Capitol Hill this week -- no Iraqi insurgents or al Sadr militiamen could have been more hostile. No wonder. The goals of the Democrats and both al Qaeda and al Sadr insurgents are the same: the defeat of the United States in the war in Iraq. There must have been times when Gen. David Petraeus and Ambassador Ryan Crocker thought they were back in embattled Sadr City when they faced Democrats on Capitol Hill...