When a Democratic politician needs to "get healthy," Katie Couric is normally brought in to groove some pitches down the middle of the plate for him to hit out of the park. In his just-completed interview with embattled California Gov. Gray Davis, the Today Show's Matt Lauer demonstrated that he's no slouch when it comes to serving them up on a platter for liberals looking to raise their batting average. Start with the format of the interview. Matt permitted Davis's wife to sit in. That's a tried-and-true technique to cast an unpopular pol in a softer and more sympathetic light....