The primary turnout in the county in 2022 was just under 36 percent, and this year’s county tally is likely to be under 30%, based on this week’s trends.

If Rosen’s totals hold above 50% he will be declared the winner. He was unopposed in his previous two re-election bids.

The San Jose vote will determine whether the new mayor elected this fall serves two or four years.

In San José, despite a hotly contested mayoral contest, just 17 percent of the more than a half-million eligible voters had returned ballots one day before the election.