November 2, 2017April 18, 2018rhaugh2154 County Supervisor Candidates Santa Clara County District 4 Candidates: Susan Ellenberg, Pierluigi Oliverio, Jason Baker, Dominic Caserta and Don Rocha. Santa Clara County District 4 Candidates: Susan Ellenberg, Pierluigi Oliverio, Jason Baker, Dominic Caserta and Don Rocha.