SAN JOSE (CBS SF) — Santa Clara County Supervisor Dave Cortese has a slight advantage over Councilman Sam Liccardo in San Jose’s mayoral race, according to SurveyUSA research conducted for KPIX.

Out of the 540 voters that already returned a ballot, or is likely to do so before Election Day, 44 percent backed Cortese and 38 percent selected Liccardo, while 19 percent said they’re undecided. The overall margin of sampling error was plus or minus 4.3 percentage points.

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The survey results also show women and Asian-Americans are a core part of Cortese’s constituency, while white voters favor Liccardo. Hispanic Americans are split, as are men. Women backed Cortese by 14 points.

Cortese leads among lower-income and lesser-educated voters while Liccardo has a narrow advantage among the most educated and the most affluent, according to the survey.

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The race is nearly tied among respondents who said they already turned in a ballet, but among those who have not yet returned a ballot and plan to do so, Cortese has a 7 point lead.

MORE: View The Complete Survey Results

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