Bill Clinton is reportedly endorsing San Francisco mayor Gavin Newsom over Attorney General Jerry Brown in the California's Democratic gubernatorial primary. Why? One reason is that Newsom supported Hillary Clinton's 2008 presidential bid. (Newsom still remembered an old snub by Barack Obama.) But there is another, bigger, reason.
When Brown ran against Clinton for the 1992 presidential nomination, things got ... heated. See:
As William Faulkner once explained: "The past is never dead. It's not even past."