NEW YORK -- Sydney Leathers, a young woman who claims to have had a sexually charged online affair with mayoral candidate Anthony Weiner, says she is proof that Weiner hasn't changed since a series of similar relationships derailed his political career two years ago. Weiner, meanwhile, appeared hard-pressed Thursday to say how many women besides Leathers he had sexted, tweeted, emailed and flirted with in cyberspace since being forced out of New York's 9th Congressional District seat in June 2011. “I don’t believe I had any more than three,” Weiner, 48, told reporters during a campaign appearance Thursday, two days...