Bush does the obvious. Kerry gives him the chance. This is politics. Bush has no coherent argument for his party or his record. This is not what this election is or should be about. But Kerry is the gift that keeps on giving, isn't he? He just rallied the base - the Republican base - more successfully than Karl Rove could. Someone very close to the president once observed that Bush's signature theme is his luck. Above all, he is lucky in his enemies. And how.