A new Gallup Poll says George W. Bush is the most polarizing President in the history of its surveys on the subject. It's hard to believe that the good ol' Texas guy is more divisive than, say, Richard Nixon or Bill Clinton, but apparently he is. Gallup says 91% of Republicans like the President, but just 17% of the Democrats do. In a bad news situation for Mr. Bush, Gallup also sees independent voters shifting away from the Chief Executive. What's in play here, I believe, is the increasing polarization of the country, not just the policies of President Bush....