Bush is using straw-man arguments. Rumsfeld pulls a false-analogy. (With a little slippery-slope on the side).

"Consider that if we retreat now, there is every reason to believe Saddamists and terrorists will fill the vacuum -- and the free world might not have the will to face them again. Turning our backs on postwar Iraq today would be the modern equivalent of handing postwar Germany back to the Nazis. It would be as great a disgrace as if we had asked the liberated nations of Eastern Europe to return to Soviet domination because it was too hard or too tough or we didn't have the patience to work with them as they built free countries."