Contact: Mark Church, Chief Elections Officer & Assessor-County Clerk-RecorderAlternate: Jim Irizarry, Assistant Chief Elections Officer & Assessor-County Clerk-Recorder (Redwood City, CA) On January 23, the San Mateo County Registration & Elections Division will begin mailing the Sample Ballot & Voter Information Pamphlet for the March 3, 2020 Presidential Primary Election to registered voters.