Political Excess: Behind Nancy Pelosi's four days of revelry celebrating her speakership is a carefully crafted purpose. But if her background is any indication, all that public relations may end up backfiring. On one day, a street will be named after her in Little Italy in Baltimore, where her father served as mayor. On another, Tony Bennett will serenade her at an Italian Embassy banquet with "I Left My Heart in San Francisco." The Italian motif is apt, because the bacchanalia taking up most of next week in Washington will be a lot like the Roman Empire's legions marching into...