TRENTON, N.J.—The first woman known to have filed a sexual harassment claim against GOP presidential candidate Herman Cain while he ran a trade group shows no interest in revealing her identity or publicly discussing her accusations against the Georgia businessman. The woman, who works for one of New Jersey's largest lobbying firms, has deliberately made herself scarce. ----break--- The firm's founder, who didn't return calls from the AP seeking comment, has close ties to Gov. Chris Christie, who threw his support to Mitt Romney after deciding against entering the GOP presidential campaign himself. Another partner helped Romney in his 2008...