A global media scrum descended on the Chester County suburb of Malvern yesterday because of a furor over a rumored romantic link between a 1995 Great Valley High School grad and presidential hopeful John Kerry. Despite the frenzy, little information was forthcoming yesterday, and there was no confirmation of any relationship between Kerry and the woman. Several news trucks and assorted gawkers loitered outside the home of the parents of 27-year-old Alexandra Polier after her dad was quoted in a British tabloid that Kerry was "a sleazeball" who'd shown an interest in his daughter. Polier, who was a cross-country star...