As georgebush's presidency draws to a close, biographers are scrambling to capture its essence between hard covers. Few will do as good a job as Lou and Carl Cannon. The Cannons are canny, diligent reporters steeped in American politics. Mr Cannon senior has written five books about Ronald Reagan. Carl, his son, was until recently the White House correspondent for the National Journal, a weekly magazine for Washington insiders. In "Reagan's Disciple", they have produced as subtle an account of the past seven years as you could wish for.
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