ATLANTA -- Herman Cain's presidential campaign is assailing the woman who accused him of groping her while she sought a job, presumably in an effort to undercut her credibility.The Republican businessman's advisers issued a news release Tuesday asking -- quote -- "Who is Sharon Bialek?" That document then outlines what it calls her "long and troubled history, from the courts to personal finances."It lists civil lawsuits that allegedly relate to her in the Cook County Court system in Illinois.