...smart. Perhaps just enough intelligence to bring his nastiness to a cunning level. See, if he plays Dumbya, he doesn't shoulder as much of the blame for things. He was just a "victim" of his powerful smart advisors.
Remember, he, along with Rove, learned all about maliciousness and lying at Atwater's knee, as it were. I think he is as downright spiteful, cunning, and evil as his compatriots. The dumb act is just that, an act. It moves attention off of him, and he is free to act unhindered (Clinton NEVER had a moments peace, and everyone knows how intelligent he is). It's all a feint. I believe he has a much bigger role in all this crap than any but a chosen few realize. Remember, the orders have to come from somewhere.
He is a classic sociopath. Check this
http://home.datawest.net/esn-recovery/artcls/socio.htm out for a rundown of the characteristics of a sociopath. It's scary because all but one or two signs fit him to a T.
Here's a few:
Glibness/Superficial Charm
Manipulative and Co(u)nning
Grandiose Sense of Self
Pathological Lying
Lack of Remorse, Shame or Guilt
Need for Stimulation
Early Behavior Problems/Juvenile Delinquency
Irresponsibility/Unreliability
Lack of Realistic Life Plan/Parasitic Lifestyle
Criminal or Entrepreneurial Versatility
Our country is being run by a sociopath. This is the scariest thing in the world.