q]So what is your point of view? That they are screwing this up on purpose? [/quote]
John, there are other possibilities, that fit the evidence; in particular, that they simply have a different agenda which is going just fine.
It's hard to make sense of some actions until you know the agenda behind them. For example, the republicans playing parliamentary games extending a vote all night after they lost and twisting arms on the floor with bribes and threats may be difficult to understand until you realize they were repaying their biggest donor with $150B in profit from taxes.
You would have a hard time making any sense of the whole Congress making a priority, and the president cutting short a vacation for the first time and signing a bill at midnight, over the concern for one woman in a coma (when he'd approved legislation allowing such people to have care terminated as governor), unless you understood that the behavior was part of the political care and feeding of their base, to create an election issue intended to get the bas out voting for them, even though the bad press didn't go as they wanted and it hurt them.
You have a lot beneath the surface on the Iraq issue, just as you did when the US support Saddam invading Iran in the 80's, greatly weakening both our "enemies". While the president made the entire issue WMD as a pretext, it wasn't the real agenda. Even Paul Wolfowitz admitted it was selected for PR to get people united for "bureaucratic reasons".
They're not 'screwing it up on purpose' any more than Frist 'screwed up his remote diagnosis of Terry Schiavo on purpose'. You have to read books by the right experts - try Robert Fisk, or "Assassin's Gate", or "Fiasco" for a start - to get more background on what's happening. Without that, you can't make a lot of sense.
The war has already served some purposes of Bush, from letting him be a 'war president that was required politically for him to win re-election, to vast military spending which not only has some direct benefits but also starves democrats' programs. But the larger understanding is simply a combination of the ideological agena of the PNAC group for US world power in the coming decades at the point of a gun, with the overthrow of Saddam a main stepping stone, along with the utter incompetence of Bush and his circle.