According to the Sentinel: San Francisco Mayor Gavin Newsom will lead an Embarcadero rally today in support of the Hillary Clinton presidential campaign. The even will be held on the second floor of the Ferry Building, located at 1 Embarcadero, at 5:00 p.m. Members of the media must arrive for setup by 4:45 p.m. Rumor has it that Mayor Gavin Newsom will be joined by a "special guest star": former President Bill Clinton. But......