From Jon Kyl today on the Senate floor:

When people talk about supporting the troops, it seems to me that the first type of support that we should be providing is the moral support for these soldiers, to support their mission. Not only to provide everything they need in terms of material support and training but to ensure – but to assure them that they are not risking their lives in vain, that we will continue to support the mission that we’ve sent they will on, that they think they can win and believe they are winning; that the worst thing we could do is to have expressions here in the U.S. Senate that we think they’ve lost or that they can’t win and, therefore, we want to begin declaring tweet and leaving the – declaring defeat and leaving the battlefield.
At that point, as it was back in Vietnam, it becomes the question of who is the last man out and the last person to risk life – and for what? That can’t be why we send men and women into harm’s way.
And for those who believe that it is already lost and that it is a failure and we cannot succeed, I say to them, you have an obligation to try to bring them home immediately because not one more day should pass for people to risk life for nothing more than a timetable. I don’t happen to believe that. General Petraeus doesn’t happen to believe this. And I believe that we can allow the Petraeus plan to have the time it needs to show that it can succeed, not just in Anbar province but in other places in Iraq as well.