The owner of a luxury San Francisco department store took out a full-page ad to bash the city’s leadership — warning that rampant homelessness and drug abuse could force it to shut up shop after 166 years. “Gump’s has been a San Francisco icon for more than 165 years,” John Chachas wrote in his open letter to Gov. Gavin Newsom, Mayor London Breed and the San Francisco Board of Supervisors. “Today, as we prepare for our 166th holiday season at 250 Post Street, we fear this may be our last because of the profound erosion of this city’s conditions.” The...