NEW YORK — With patrician mannerisms and that instantly recognizable jawline, father George 41, son George 43 and some 80 other Bush relatives were proof this week that politics is the family business of a large and far-flung dynasty. There are fewer Cheneys, but all of the vice president's immediate family was on hand for the Republican convention — even an 8-week-old grandson. For the big finale Thursday, three generations of each clan were onstage as President Bush and Vice President Dick Cheney accepted the party nomination. The tableau was scripted down to first daughter Jenna Bush's teasing references to...