Opinion (David Ignatius): Expect the worst in Iraq

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 responsibility for their own security. But we all need to face the likelihood that this story isn't going to have a happy ending.

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