CBS News is expected to announce on Thursday that Rome Hartman is being ousted as CBS Evening News' executive producer, with former CNN and MSNBC prez Rick Kaplan to take his place. "Changes had to be made," a source tells the New York Post, alluding to Katie Couric's February-sweeps ratings, which again found her a distant third and, worse, delivering a six-percent smaller audience than Bob Schieffer drew a year ago. Adds the Post's insider, "This was a competitive move, an aggressive move by [CBS News president] Sean [McManus]."

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