I think he's gotten the message across just fine. I think it mostly has to do with the war and the whole botched post-Katrina response. It's the people he's surrounded himself with who have the bad ideas and who have been incompetent.
I agree Reb and maybe "dumb" is not the correct word for Bush. But, it seems that he is one that, to steal a Colbert phrase, uses his "gut" or "faith" to make decisions rather than good solid evidence, advice or logic. I'm not sure if calling that "dumb" is the right word, but whatever you call it, it's not desirable in a President.