Rep. Barbara Lee and House Minority Leader Nancy Pelosi are rarely shy about taking stands on issues, except when it comes to the question “Bernie or Hillary?” Lee and Pelosi are the only two elected Bay Area Democrats who have not publicly endorsed either Vermont Sen. Bernie Sanders or former Secretary of State Hillary Clinton. Even Pelosi’s daughter Christine Pelosi is backing Clinton, and appeared at the opening of Clinton’s new San Francisco field office Monday. Their rare reticence is rooted in the raw political calculus of not wanting to alienate the partisans on either side, which could result in...