If you ask anyone around Hillary Clinton the question that everyone is asking, the answer comes back in a shot: The freshman Senator from New York is far too busy concentrating on her re-election in November to be giving even a passing thought to 2008. Thank you very much. But politics is ultimately a game of logistics, and the junior Senator is putting the machinery in place for a campaign that looks far grander than a re-election cakewalk in New York. All it will need is for someone to throw the switch. Against virtually nonexistent opposition for her Senate seat,...