Do they do it to keep us off balance? Just when you're about to write off The Today Show as hopeless DNC surrogates, they pull something like this morning. In separate interviews, Katie Couric made manifest her skepticism about John Edwards, while (the solid professional, IMHO) Jamie Gangel treated Laura Bush in a reasonable and straightforward manner. Katie began her interview with Edwards and wife Elizabeth with a shot between the eyes: "Despite a nationwide bump in the polls when you were named to the ticket, a new poll in NC shows Kerry/Edwards down by 15%." Edwards: "I'm not a...