If you think American politics have gotten nastier, crueler, and more symbolic over the last 20 years, blame Ted Kennedy. This month marks the 20th anniversary of the borking of Judge Robert Bork, Ronald Reagan’s failed Supreme Court nominee. And it was Ted Kennedy’s bilious bugle blast that brought the man down. Almost immediately after Reagan nominated Bork, Kennedy pulled himself off his barstool and proclaimed: “Robert Bork’s America is a land in which women would be forced into back-alley abortions, blacks would sit at segregated lunch counters, rogue police could break down citizens’ doors in midnight raids, schoolchildren could...