Is Bush's Idiocy/Speech Problems an act?

Bush has had so many language errors that I am thinking it is an act. His speaking errors are not just stammers or mis-speakings. Bush's statements seem staged to get a laugh response. Some of his speaking errors could not possibly have been mistakes because they are so clearly conveyed and joke/pun like and couldn't have been confused with something that was a legitimate statement.

Is this a staged distraction?

Why stage this? To make Bush look incompetent, to make him look incapable of orchestrating 911. To keep people talking about how badly he is responding to 911 and Terrorism instead of accusing him of actually planning 911.