"That report showed that much of the WMD intelligence was from Clinton days"
That would actually be bad for the GOP. That would show that they didn't have "new" intelligence prior to going in and depended on old information to justify the invasion.
I don't think they would be happy to have that released. It would also show that the CIA didn't a single person on the ground in Iraq, but relied entirely on foreign intelligence sources.
They may well didn't have much new information refuting the Clinton Position that Iraq was awash in WMD. In the absence of 9-11 I don't think that the WMD in Iraq was actionable.
With the War on Terror hostilities in Iraq became an action in a larger war. The WH should point this out often since the Democrats are succeeding in isolating Iraq as an issue removed from the War on Terror. It is sort of like the MSM reporting only on the European Theater during WWII.