Campaign Calculus: The 'sweet Jesus' moment

In second edition of our Campaign Calculus series, showing the arc of the campaign juxtaposed with Nate Silver's daily predictions, Obama gained a major lead. This past week, President Obama steadily rose in Silver's "Chance of Winning" category, reaching 83.9 percent by Thursday — the highest so far in this election cycle. Is the campaign almost a done deal? MSNBC's Joe Scarborough seems to have reached his limit.