The debate tonight presents a tremendous opportunity for the campaign to attract undecided voters, but people's perceptions are shaped as much by their conversations around the water cooler as by the debates themselves. The Vice President's goal is to do what he's been doing throughout this election: explain to the American people why the President's policies are right for America and the world we live in today - in fighting the war on terror, in keeping our economy growing and in responding to the new challenges of the 21st century. After last week's debate, the Kerry campaign spin machine...