Countywide voters had the chance Tuesday to decide whether term limits should be placed on county supervisors.
Prop B would impose a two-term limit on the office holders, who would serve a maximum of eight years. It had the support of 71 percent of voters at midnight, with 30 percent of precincts reporting.
All the current supervisors on the board have served since the mid-1990s.
Supporters of Prop B argued that it was time to get rid of career politicians, while those who opposed the ballot measure said it was a power grab by the unions, who are unhappy about job cuts to balance the budget.
Prop B's campaign manager, Mathew Kostrinsky, said the likely passage of the measures was not surprising because people want change and better government.
"It's time for a change," Kostrinsky said. "These supervisors are out of touch, and when they're there for such a long time as they see at the county, you disconnect with voters, disconnect with constituents, disconnect with the recipients of services you're supposed to be providing."
Current Supervisor Dianne Jacob said it reflects anger across the board at all politicians, stressing her belief that term limits do not mean good government.
"I don't think it's anything personally against any particular supervisor," Jacob said Tuesday night. "It's overall anger at government in general and those in office currently from federal, level, to state level. People are angry and just want to lash our anywhere they can."
Two county supervisors, Bill Horn and Ron Roberts, were involved in races Tuesday. Both men appeared to be besting their competition at midnight, with Horn polling at 46 percent with 24 percent of precincts reporting and Roberts at 50 percent. If either candidate were to fail to garner 50 percent plus one, he would face his closest challenger in November in runoff elections.
Jacob said the measure's passage will not affect any current board member -- they can still run for two more terms -- noting that all the supervisors are in their 60s and 70s.