1. After entering Iraq George Bush did not defend his assertion that Iraq had stockpiles of wmd. He left his defenders twisting in the wind without lifting one finger to help.
2. The Iraq monitoring group and Hans Blick consistently stated there were no stockpiles of wmds in iraq.
3. Missing stockpiles of wmds that would have been new in 2003 have not been found.
Taking the above 3 into account it would be reasonable for a fair American to say that Bush misrepresented the case of wmds in iraq. His refusal to defend his assertion from the beginning of his operation is a sobering thought.
Presenting the material which would have justified the assertion might have compromised HUMINT assets, technological capabilities, or both. There are sometimes valid reasons for not disclosing how you know what you know, and couching that information in more vague and intuitive terms rather than as absolute sourced information.