With just a bit more than a majority vote of 50.14 percent, Lieberstein appears to have staved off a runoff against a challenger.
He ran against Chief Deputy District Attorney Thomas Kensok and criminal attorney and former Deputy District Attorney Douglas Pharr.
Kensok trailed his boss with more than 28 percent of votes, while Pharr fell to third with just more than 21 percent. A majority vote was required to avoid a runoff election in the November election with the top two vote-getters.
Napa County Sheriff John Robertson, 55, kept his position earning more than 68 percent of votes in a low-key contest.
[Related: UPDATED: Preliminary Election Results for Napa County Candidates.]
His opponent, Brian Banducci, garnered 31.75 percent. A majority vote was required. Robertson was appointed in 2012 when Sheriff Doug Koford retired. His campaign emphasized his law enforcement experience since 1981 when he joined the San Mateo Police Department.
He transferred to the Napa County Sheriff's Office in 1991. Banducci was in the Napa County Sheriff's Office for 31 years before retiring as undersheriff in 2013. Returns for the District 3 Board of Supervisors seat race were not complete as of early this morning.
Based solely on vote-by-mail ballot results as of late Tuesday, incumbent Supervisor Diane Dillon was leading her challenger Yountville Vice Mayor Lewis Chilton.
Supervisor Dillon, of St. Helena, is seeking her fourth term as the District 3 representative once her current term expires this December. The race requires a majority vote.
[Related: Neel Kashkari: The Man Who Will Square off with Gov. Brown.]
Federal officials from the U.S. Department of Justice sent observers from the U.S. Office of Personnel Management to monitor polling places in Napa County Tuesday to make sure the election was in compliance with federal vote right laws as part of a routine operation.
Four federal monitors checked that Spanish-language materials were available to voters after the county became a dual-language county in 2011 after passing a threshold of Spanish-speaking residents.
Alameda County polls were also under monitor Tuesday as part of a 2011 court order. The court order required that Alameda County maintain an adequate number of bilingual poll workers who speak Spanish and Chinese languages.
Other election coverage:
- Assembly Candidate Dodd To Host Election Gathering Tonight in Napa.
- DA, Supervisor & Sheriff Face Election Challenges On June 3 In Napa County.
- Citizen Writes: Why Brian Banducci for Sheriff.
--Bay City News