WASHINGTON -- Is America ready to be led by another Massachusetts senator, a former Navy war hero with the initials "JFK," a rich, Catholic Bostonian with patrician looks and a glamorous wife, a forward-looking Democrat with a challenge to countrymen to be a part of something larger than themselves? John Forbes Kerry, the three-term senator from Massachusetts, the much-decorated former gunboat captain in Vietnam, the aristocrat with the Boston brogue and the Mozambique-born heiress wife, thinks so. But don't suggest to Kerry that he represents a chance for Democrats to return to Camelot or that he is trying to trade...