Like her husband, Bill, Hillary’s often accused of having a strategically split personality – publicly, a supportive wife and doting mother; privately, a shrewish, power-hungry manipulator. Her two visits to New York last week prove otherwise: She has two faces, all right, but neither is recognizable. First she spoke at NYU’s “Third Way” conference, the kind of high-minded exchange on global issues she’s said to live for. But instead of letting herself go in the world of ideas, she came off like a Cryogenic Queen. Paramedics are still working to revive some of the spectators who endured her stultifying session on “Civil Society and the Future of Democracy.” Two days later, she showed up for a perfunctory fund-raising appearance for Senate hopeful Chuck Schumer. This time, however, she was breathing fire, blasting Al D’Amato as “a Jesse Helms clone.” About the only thing she didn’t call him was a liar.