Bob Novak says Dean is nuts for even mentioning the rumor that the White House was warned 911 was in the works.
He might want to (I'm sure he has, actually) read this:
http://www.dailytelegraph.co.uk/news/main.jhtml?xml=/news/2001/09/16/wcia16.xml
or any number of stories about other warnings published in mainstream publications in the months following 911.
I'm glad he brought it up. Dean should say "Ask the President, don't ask me. I wansn't the one who was apparently warned about a massive terrorist strike on US soil."