Who's Waiting in the Wings?

San Francisco Magazine Andrea Powell WikiCommons Nancy Pelosi and Dianne Feinstein are challenging Fidel Castro for political longevity. But someday they’ll bow out. Who’s likely to replace them?   Editor's Note: This is one of many stories about politics that San Francisco is publishing over the next month, all part of the October 2016 Democracy Issue. To peruse the rest of the issue's contents, and to read stories as they become available online, click here. Images and Captions:  Schedul...