Here's how I vented my frustration with how this has become a daily staple of campaign coverage.
Here's Stanley Fish's more erudite take.
This denouncing and renouncing game is simply not serious. It is a media-staged theater, produced not in response to genuine concerns – no one thinks that Obama is unpatriotic or that Clinton is a racist or that McCain is a right-wing bigot – but in response to the needs of a news cycle. First you do the outrage (did you see what X said?), then you put the question to the candidate (do you hereby denounce and renounce?), then you have a debate on the answer (Did he go far enough? Has she shut her husband up?), and then you do endless polls that quickly become the basis of a new round.
Meanwhile, the things the candidates themselves are saying about really important matters – war, the economy, health care, the environment – are put on the back-burner until the side show is over