This seems like a reasonable expectation to me. However, the Republicans believe differently. Here is a quote from a letter sent by GOP leaders to Republicans in Congress.
Democrats want to force us to focus on defending the surge, making the case that it will work and explaining why the President's new Iraq policy is different from prior efforts and therefore justified.
We urge you to instead broaden the debate to the threat posed to Americans, the world, and all "unbelievers" by radical Islamists. We would further urge you to join us in educating the American people about the views of radical Islamists and the consequences of not defeating radical Islam in Iraq.