Pauline Kael knew she wasn’t a representative American. The onetime New Yorker film critic is famous in folk memory for having said she didn’t know anyone who voted for Richard Nixon in 1972, when he won a 49-state landslide. The way her words are misremembered, she was surprised that someone so reviled by her social set could win the White House. In fact, she wasn’t surprised: Kael told the…