President Bush: The Definitive Proof of the Big Lie about Iraq and 9/11

President Bush has made a big deal lately about how he never said Iraq and Saddam Hussein were behind 9/11, and therefore the war in Iraq was not sold on that basis. Anyone who lived through those years knows the Bush administration went out of its way to give that impression - namely, that it rallied the nation to war based on the idea that Saddam was behind 9/11. That is why such a large percentage of Americans believed that to be the case, and many still do. But is there any proof that President Bush did that? You can't impeach someone for being misunderstood, can you? Where's the proof?
Here is the letter the President sent to Congress on the day before the war began:

Presidential Letter 
Text of a Letter from the President to the Speaker of the House of Representatives and the President Pro Tempore of the Senate
“March 18, 2003
Dear Mr. Speaker: (Dear Mr. President:)
Consistent with section 3(b) of the Authorization for Use of Military Force Against Iraq Resolution of 2002 (Public Law 107-243), and based on information available to me, including that in the enclosed document, I determine that:
(1) reliance by the United States on further diplomatic and other peaceful means alone will neither (A) adequately protect the national security of the United States against the continuing threat posed by Iraq nor (B) likely lead to enforcement of all relevant United Nations Security Council resolutions regarding Iraq; and
(2) acting pursuant to the Constitution and Public Law 107-243 is consistent with the United States and other countries continuing to take the necessary actions against international terrorists and terrorist organizations, including those nations, organizations, or persons who planned, authorized, committed, or aided the terrorist attacks that occurred on September 11, 2001.
Sincerely,
GEORGE W. BUSH”

There's your proof: Iraq was based on a lie, a lie that President Bush now denies he made.