I don't track Keith Olbermann's descents into mean-spirited bad taste systematically enough to definitively proclaim that he has charted a new low. Let's just say that he has once again indulged his proclivity to traffic for political purposes in the worst of ill-will.Readers will recall during that during the 2004 presidential campaign, both members of the Dem ticket went clumsily out of their way to alert voters to the fact that Dick and Lynne Cheney have a gay daughter, Mary. In that same mean spirit, on tonight's Countdown Olbermann acidly observed: "the Vice-President is about to become a grandfather for...