Besides trying to sell a book, Clarke was launching a political attack on GWB in the midst of an election year. The timing of the book and the contents are not coincidental. Particularly damning was his comments that Bush was doing a terrible job in fighting terrorism and that Iraq was a distraction. This is nonsense since Iraq has been on the State Department's list of state sponsors of terrorism for over a decade and we have been bogged down for more than 10 years enforcing two no-fly zones over Iraq.
Iraq was on the list of terrorist sponsers (like many of our current "allies"). But hadn't attacked us as Clark said and was not behind 9/11. The point Clark was trying to make is that Bush and his administration wanted war with Iraq after 9/11 with no proof of any connection to 9/11 (that they admit now) but wanted Clark to establish a link or at least a link to AQ. He said- categorically that no operational relationship between Iraq and AQ existed and that the President was told this by him, CIA, elements in the DOD, and the FBI and yet ignored it and relied on more dubious unvetted intel by his own political appointees.