it’s all Oprah all the time this weekend for the Obama camapaign -- a whirlwind tour with stops in Iowa, New Hamsphire and South Carolina. Can Oprah’s blessing do for Obama what it does for authors and advertisers? We’ll see. But there’s no doubt that the Big O can turn out the crowds and the media. Oprah deals with Obama’s “experience” issue. Sound Bite: “I challenge you to see through those people who try and convince you that experience with politics as usual is more valuable than wisdom won from years of serving people outside the walls of Washington, DC.”