SAN FRANCISCO (KPIX 5) — While Gov. Jerry Brown retains a huge lead less than two weeks before the June 3rd primary election, a new KPIX 5 / SurveyUSA poll shows the race to be the governor’s challenger in November appears to be tightening.

In a sample of 610 likely voters and people who have voted early, Republican Neel Kashkari is gaining on GOP Assemblyman Tim Donnelly. The assemblyman is still leading among all of Brown’s challengers at 18 percent, but the latest poll has 11 percent supporting Kashkari.

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Among Republicans, Donnelly has 48 percent of GOP support, while Kashkari has 24 percent.

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The poll shows Brown keeping a double-digit lead over his challengers, with 57 percent of those surveyed supporting him for re-election to an unprecedented fourth term in office.

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SurveyUSA also asked voters about who they would support in the races for State Controller and Secretary of State.

In the race for Controller, Republican and Fresno Mayor Ashley Swearengin is leading against her two Democratic challengers heading into the primary. Swearengin has 31 percent of the vote, while Democrats Betty Yee and John Perez have 24 percent and 18 percent, respectively.

Meanwhile, in the Secretary of State contest, it appears that Democratic State Senator Alex Padilla and Republican Pete Peterson will advance to the general election in November. Padilla is supported by 48 percent of those surveyed, while Peterson has 32 percent.

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The poll has a margin of error of plus/minus four percent.