Debate transcripts:
http://www.keyesarchives.com/transcript.php?id=367
http://www.keyesarchives.com/transcript.php?id=373
http://www.keyesarchives.com/transcript.php?id=370
The third one has the money quote: “I’m not running to be the minister of Illinois. I’m running to be its United States Senator.”
That could be the origin of this meme. However, the Post and Email claims two witnesses to it, and under different circumstances, However witness testimony is unreliable in my opinion. At the moment I am going to classify it as unproven.
http://www.thepostemail.com/2009/10/21/2nd-witness-to-obama-admission-in-keyes-vs-obama-2004-debate/