WASHINGTON It was no accident that John Kerry appeared on a daytime television interview show and recalled his days as a young prosecutor representing a rape victim. Or that he then flew from New York to Florida to promote his health care proposals. Or that on Thursday he will preside over an Iowa town hall meeting on national security with an audience made up entirely of women. These appearances are part of an energetic drive by the Kerry campaign to win back voters that Democrats think are rightfully theirs: women.