US Secretary of Defense, Donald Rumsfeld, will have ceased serving as Secretary of Defense of the United States by 2003-10-01. This claim will be true if Sec. Rumsfeld is removed or replaced as Secretary of Defense under circimstances that are not clearly temporary for at least 24 hours even if Rumsfeld is later reinstated. If Secretary of Defense Rumsfeld is temporarily incapacitated (i.e. for health reasons), temporarily replacing him would not satisfy conditions of this claim.
I will tend to judge this claim "true" if Rumsfeld appears to be a scapegoat for problems with the Defense Department, at home or in the field, so long as he is not functioning as the US Secretary of Defense.