Go back to 2006, when things started getting especially difficult for U.S. forces in Iraq. It was an opportunity for insurgents, but more important to Democrats, it was an opportunity for Democrats. Their objective was not to secure the success of a democratic U.S. ally in Baghdad. It was to inflict political damage on George W. Bush, and they did so by portraying the 2003 invasion as illegal and the ensuing battle as a disaster.