SAN FRANCISCO (KCBS) – A new poll finds the race for the Democratic presidential nomination between Hillary Clinton and Bernie Sanders is tightening in California. Meanwhile, Donald Trump has a double-digit lead among the state’s Republicans.

The Public Policy Institute of California found the former Secretary of State notched 48 percent among likely Democratic primary voters. Democrats and independents are eligible to vote in the Democratic primary.

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Sanders had 41 percent among likely Democratic primary voters. The senator from Vermont has climbed in popularity in California, since registering in single digits in independent polling early last year.

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Among Republicans, Trump had 38 percent, with Sen. Ted Cruz of Texas and Gov. John Kasich of Ohio. The survey found the businessman holds the edge among age, education, gender and income groups.

The Republican primary is open only to registered GOP voters.

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California’s primary election will take place on June 7th.