WASHINGTON (AP) - The impeachment of former President Bill Clinton is in a gray area of history, too long ago to be a current event, too recent to be judged in perspective. Yet history is already judging Clinton in the place where millions of students get their information about him - textbooks. Seven years after he was impeached in a scandal of sex, perjury and bitter politics, Clinton has become a fixture in major high school texts. The impeachment is portrayed in the context of his two-term tenure, a milestone event, but not one that overshadows how Clinton handled the...