Bob Schieffer of CBS's "Face the Nation," the moderator of the last U.S. presidential debate is a journalist of the stature of Walter Cronkite. With years of experience, and covering issues under many presidents, he says moderators are like umpires. He has declined interviews and kept as low a profile as possible. Cindy Crowley of CNN, the moderator of the second debate, came under criticism after her comment about whether Obama had called the attack in Benghazi, Libya, a terrorist attack.