sentences:  Cox, won re-election for Mayor in the June 2010 Primary election in a three-person race by winning 56.3% of the vote, her opponent Councilman Steve Castaneda garnered 29.6% and Jorge Dominguez received 13.6% of the vote.In April 2007, the Public Integrity Unit of San Diego District Attorney Bonnie Dumanis began prosecuting political opponents of Cheryl Cox.Patrick O'Toole, who had previously been appointed as US Attorney for San Diego by Attorney General John Ashcroft, headed the unit.