Wonderful Bush-destroying piece from Slate.
http://slate.msn.com/id/2100064/I'll excerpt some, but please read the whole article--it's worth your time.
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Quotations collected over the years in Slate may leave the impression that George W. Bush is a dimwit. Let's face it: A man who cannot talk about education without making a humiliating grammatical mistake ("The illiteracy level of our children are appalling"); who cannot keep straight the three branches of government ("It's the executive branch's job to interpret law"); who coins ridiculous words ("Hispanos," "arbolist," "subliminable," "resignate," "transformationed"); who habitually says the opposite of what he intends ("the death tax is good for people from all walks of life!") sounds like a grade-A imbecile.
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The most obvious expression of Bush's choice of ignorance is that, at the age of 57, he knows nothing about policy or history. After years of working as his dad's spear-chucker in Washington, he didn't understand the difference between Medicare and Medicaid, the second- and third-largest federal programs. Well into his plans for invading Iraq, Bush still couldn't get down the distinction between Sunni and Shiite Muslims, the key religious divide in a country he was about to occupy. Though he sometimes carries books for show, he either does not read them or doesn't absorb anything from them.
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A fourth and final quality of Bush's mind is that it does not think. The president can't tolerate debate about issues. Offered an option, he makes up his mind quickly and never reconsiders. At an elementary school, a child once asked him whether it was hard to make decisions as president. "Most of the decisions come pretty easily for me, to be frank with you." By leaping to conclusions based on what he "believes," Bush avoids contemplating even the most obvious basic contradictions: between his policy of tax cuts and reducing the deficit; between his call for a humble foreign policy based on alliances and his unilateral assertion of American power; between his support for in-vitro fertilization (which destroys embryos) and his opposition to fetal stem-cell research (because it destroys embryos).
Why would someone capable of being smart choose to be stupid? To understand, you have to look at W.'s relationship with father. This filial bond involves more tension than meets the eye. Dad was away for much of his oldest son's childhood. Little George grew up closer to his acid-tongued mother and acted out against the absent parent—through adolescent misbehavior, academic failure, dissipation, and basically not accomplishing anything at all until well into his 40s.
(and much more)