File photo of California Senator Barbara Boxer at a fund raiser in San Francisco

 
File photo of California Senator Barbara Boxer at a fund raiser in San Francisco
California Senator Barbara Boxer listens as U.S. President Barack Obama speaks at a fund raiser for her in San Francisco in this May 25, 2010 file photograph. Boxer has extended her narrow lead over Republican challenger Carly Fiorina in her closely watched bid for re-election in November, according to a poll released on September 24, 2010. REUTERS/Kevin Lamarque/Files (UNITED STATES - Tags: POLITICS ELECTIONS)