There has been some debate here in Denver about how much of the convention should be spent attacking the McCain campaign. That debate obviously isn't being waged over TV advertising. The latest spot from Barack Obama's team hits John McCain right in the gut by quoting him on the economy: "Economics is not something I've understood as well as I should." That's a poor choice of words considering the issues in this election. The ad then follows up with a cross to the face by showing McCain embracing George W. Bush in a bear hug.