The quickest way to shut up a liberal when they try this cr@p (i.e. say Bush hasn't found Bin Laden or Saddam) is to counter with "Our troops are working long and hard to find them and we support their efforts. That you feel the need to denigrate their work is appalling and telling". It shuts them up every time.
The libs who love to trash the President by trashing the military aren't so vocal on this.
Methinks Osama died in December 2001. Saddam is likely in hiding. The goal was to topple Saddam (he was even offered the ability to step down prior to Gulf War II). The goal was accomplished. The left is just doing their best to make the Iraq aftermath a failure so that they can cry crocodile tears.