Sometime before the Sept. 14 Democratic primary, we need to tag along with Kathleen Rice as she campaigns for the nomination for attorney general. It's only a matter of time, surely, before the ritual of seeking votes takes on this twist. Ms. Rice, now the Nassau County district attorney, will ask one of New York's 5 million or so enrolled Democrats to vote for her. And that person will reply, in essence: Why should I vote for you, when you didn't vote for ... anyone?