Any dissatisfaction with the Iraq war can be laid directly at the feet of President Bush. He hasn't been able to really articulate what our purpose there is. Unless I'm missing something, all of what he says concerning the war is forced through the lens of securing freedom and democracy in order that the forces that shape Islam can be defeated. That's all well and good, and true, as far as it goes, but I don't think he's done a good job of really explaining how and why that's so.
Rallying Americans for the war effort with this as the rallying cry doesn't have longevity. As Soldiers keep dying the securing freedom talk becomes less persuasive. We also have duty to keep an eye on things, to make sure that Soldiers have a voice with which to protest methods used or even oppose the effort, if it's going badly, since they have no real voice of their own. Victor Davis Hanson wrote a book called Carnage and Culture, and in the first few pages he described how in very early warfare, soldiers could vote on eliminating or replacing generals, if they were under par.
If it's true that Rumsfeld has resigned, it shows a marked incompetency on the part of the Administration. I don't believe that it's just coincidence, I believe they were forced to make a decision they perhaps should have made a long time ago, and which the military mugwumps have long been calling for. The republicans got their heads handed to them because incompetency is a charge that can be leveled against them pretty fairly.
President Bush never understood what our purpose should be. He thought you just remove the tyrants in a society and lead the people to Democracy and the example in Iraq will bring all the other dark age societies to the light. You cannot change an entire ethos by knocking the head honcho down. Germany was a Western society in the 1930s. We had to thoroughly beat and stun the populace before we could reshape thee Germans' worldview sufficiently to remold the society, which we did. We had to do the same to the Japanese population and we succeeded there. We approached a totally alien society in Iraq with an entirely different view of proper relationship and why things happen and we did not break the society down. We just changed the channel on their TV and all the people see is static.