Well, Kenneth Pollack, former National Security Council official in the Clinton administration, commented in the January/February 2004 issue of The Atlantic Monthly on what U.S. intelligence believed regarding Iraq's nuclear program:

The U.S. Intelligence Community’s belief toward the end of the Clinton Administration [was] that Iraq had reconstituted its nuclear weapons program and was close to acquiring nuclear weapons....

And, he also wrote:

In the late spring of 2002 I participated in a Washington meeting about Iraqi WMD. Those present included nearly twenty former inspectors from the United Nations Special Commission (UNSCOM), the force established in 1991 to oversee the elimination of WMD in Iraq. One of the senior people put a question to the group: Did anyone in the room doubt that Iraq was currently operating a secret centrifuge plant? No one did. Three people added that they believed Iraq was also operating a secret calutron plant (a facility for separating uranium isotopes).