Let’s see what others have had to say about George W. Bush:

“The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.”
—Bertrand Russell

“Success in almost any field depends more on energy and drive than it does on intelligence.  This explains why we have so many stupid leaders.”
—Sloan Wilson

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It is much simpler to accept that GWB is a stupid ignorant dupe with
money, connections and an amount of animal cunningness. The alternative
would be that GWB is a genious who has transcended the known human
traits and seeks status by posing as a stupid ignorant dupe. Too
complicated.

The difference with an actor is that the actor changes clothes and goes
home after the performance. There is also that saying, "Do not attribute
to malice what can be adequately explained by stupidity," which is often
true.