NIXONLAND begins in the blood and fire of the Watts riots - one week after President Johnson signed the Voting Rights Act, and nine months after his historic landslide victory over Barry Goldwater seemed to have heralded a permanent liberal consensus. The next year scores of liberals were thrown out of Congress, America was more divided than ever, and a disgraced politician was on his way to a shocking comeback: Richard Nixon. Six years later, President Nixon, harvesting the bitterness and resentment borne of that blood and fire, was re-elected in a landslide even bigger than Johnson's, and the outlines of today's US politics of red-and-blue division became distinct.