Story highlights The primary is on June 7

Trump trails Clinton and Sanders in California

Washington (CNN) A new California poll shows Hillary Clinton and Bernie Sanders locked in a dead heat, while likely Republican nominee Donald Trump trails both Democrats in general elections matchups in the blue state.

Clinton and Sanders supporters, according to the poll, match up with other states: Clinton is favored by registered Democrats and older voters, while Sanders leads among independents and younger voters. More women back Clinton and more men back Sanders, but the gender divide is small.

The potentially critical California Democratic primary is June 7. Clinton is going up with ads there starting Friday , with spots targeting Hispanic and Asian-American voters, campaign aides told CNN's Jeff Zeleny, including ads that will be aired in Spanish, Mandarin, Vietnamese and other languages. Throughout the Democratic primary contest, Clinton has performed far better in states with diverse populations like California.

Sanders has also been running advertising in California.

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