Liebermann, like the Republican candidates for president, is still arguing that the troop surge in Iraq needs to be given a chance. He and his peers are singing the same song they sang before the invasion.
Just as the neocons agitating for the invasion of Iraq knew that Saddam could never prove that he did NOT have WMDs, Lieberman has to realize that no one can ever prove that if troops were allowed to stay in Iraq just three more months they would NOT gain a victory.
And in this we have the slow bleed of a strategy that, once it is stopped, has to be deemed a failure. Until it is stopped, it can be labeled a build up to success. For this reason, Liebermann and other Bush supporters will never see conditions that suggest a troop withdrawal.