I noted below that the 9/11 commission is so polite that they wouldn't take sides in the disagreement between Khalid Sheik Mohammad and Abu Zubaydah over whether Khalid Sheik Mohammad was an original strategist of terror.  However, even  the 9/11 commission is only polite to people who respect certain limits and Ashcroft clearly crossed them by declassifying an memo in order to falsely attack a commissioner.  Let's role the tape.

Pickard appealed for more counterterrorism
enhancements, an appeal the attorney general denied on September 10.233
Ashcroft had also inherited an ongoing debate on whether and how to
modify the 1995 procedures governing intelligence sharing between the FBI
and the Justice Department’s Criminal Division. But in August 2001,Ashcroft’s
deputy, Larry Thompson, issued a memorandum reaffirming the 1995 procedures
with the clarification that evidence of “any federal felony” was to be
immediately reported by the FBI to the Criminal Division.The 1995 procedures
remained in effect until after 9/11.

still, even in this extreme case, they did not use the word perjury which would certainly have been appropriate.