Someone wake Ted Kennedy up out of his sauce induced sleep.
GO TO THE HEAD OF THE CLASS!
The enemy of my enemy is my ally.
In Afghanistan you had two parties (the "Afghan Arabs" and the native Afghans) who shared a mutual hatred for the Soviets and a deep commitment to conservative, tribal Islam. If not close allies, they were at least comfortable with each other (until later).
Though both Iraq and Al Quaeda wished us harm, there isn't any evidence that the ever collaborated on any sort of joint venture. Saddam was a secular tyrant, and OBL is a fundamentalist wack-job. Both of them hated the US, but their very different ideologies made them mutually antagonistic to one another. Besides which, Saddam didn't trust anyone whom he did not directly control or otherwise have some hold over. If he'd wanted terrorist proxies there were candidates in Palestine who were much better developed as allies and much closer to home.
Bush himself has come out denying that there was a Saddam/Al Quaeda link, we would do well to drop this false lead before it becomes the next Democrat talking point.