PREPARING FOR THE WORSTHey, cheer uphttp://www.washingtonpost.com/wp-dyn/content/article/2007/02/06/AR2007020601527.html[David Ignatius] Somehow, after four years, the debate on Iraq is still animated by wishful thinking. The White House talks as if a surge of 20,000 troops is going to stop a civil war. Democrats argue that when America withdraws its troops, Iraqis will finally take