Sam Parry has an excellent piece which enumerates quite well all the reasons Bush must go. It is exhaustive. For example:

Beyond policy concerns, Bush's comments raise questions about whether Bush may suffer from what psychiatrists call a narcissistic personality disorder. This disorder has the following characteristics: arrogant, haughty behaviors or attitudes; sense of entitlement; preoccupation with grandiose fantasies; need for excessive admiration; a grandiose sense of self-importance; inability to recognize or identify with feelings of others; exploitation of others; and envy. [This definition comes from the Diagnostic and Statistical Manual of Mental Disorders - Fourth Edition.]

and...

For now, however, the American public is like a passenger riding in a speeding car with a dangerous driver. As he weaves through traffic shouting and gesturing at other drivers on the highway, there’s not much to do but tighten the seat belt and urge more responsible behavior. There may be no reasonable chance to wrestle the steering wheel away without making a bad situation worse.

But the next time an exit ramp comes along – in, say, 2004 – a growing number of Americans appear to be thinking about easing the driver off the highway and into a rest area, where they can leave him behind and drive off with a more responsible president behind the wheel.