A former political advisor to Gov. Gavin Newsom and well-known Democratic strategist was arrested in October on charges of domestic violence and child abuse, including an alleged attempt to “suffocate” a 4-year-old child with a pillow, according to the Napa County Sheriff’s Office. Napa County Assistant Dist. Atty. Paul Gero said his office filed a two-count felony complaint Thursday against Nathan Ballard, 51, alleging domestic violence and child abuse following his Oct. 18 arrest. Ballard, who worked as Newsom’s communications director when Newsom was mayor of San Francisco, said in a recent Marin Magazine profile on Newsom and his wife,...