From CBS News' John Bentley:

COLUMBUS, OHIO -- At a news conference that just wrapped up, Fred Thompson was asked what he thought of Mike Huckabee drawing a blank when asked about recent reports about the National Intelligence Estimate re: Iran.

"Not only is Iran the major long-term threat to our country, the nuclear program is the most important part of the Iran consideration. For a presidential candidate not to know that and not to keep up with that is very suprising," said Thompson.

"These are the kinds of things I've been talking about all of my life. Now, if the American people have other priorities, if they want someone who smiles a lot more than I do, or someone who is a better quipster than I am, who has no experience in these areas, that's for the American people to decide."

Thompson is now en route to Davenport, Iowa.