In the video link below, you can see him taking something out of his pocket while his back is to the moderator and audience. He then places it on the podium before the start of the debate. The rules clearly state that they were not to bring anything with them, and were only to use the blank paper and pens that were provided.
http://www.drudgereport.com/kdn.wmv
I can't tell what he pulled out, but it looks very suspicious considering the rules.