FLORIDA IS HOME to an ill-fated child whose life was ruined upon becoming a political pawn. No, this is not another lamentation about Elian Gonzalez. This is the tragic tale of Jennifer Bush. Do you remember Jennifer? Probably not. First Lady Hillary Clinton, who helped turn Jennifer into a national political prop for health care reform in 1994, must be very grateful that we've all forgotten the poor little girl from Coral Springs. Jennifer's story, which took a shocking but largely unnoticed twist last week, is not merely a case of legislation-by-anecdote run amok. It's poster child abuse.