Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE is losing ground to Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE with California’s likely voters, according to a poll released Tuesday.

Clinton leads Trump by 17 points in the Field Poll/University of California, Berkeley, survey out Tuesday, 50 percent to 33 percent.

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July’s edition of the same poll, however, found Clinton, the Democratic presidential nominee, topping Trump, the Republican nominee, by 24 points in the Golden State.

Clinton earned 50 percent support to Trump’s 26 percent in that poll, which occurred before both the Democratic and Republican national conventions.

Green Party nominee Jill Stein currently ranks third in California with 6 percent. Libertarian presidential nominee Gary Johnson Gary Earl JohnsonWhat the numbers say about Trump's chances at reelection Presidential race tightens in Minnesota as Trump plows resources into state The Hill's Campaign Report: Biden condemns violence, blames Trump for fomenting it l Bitter Mass. primaries reach the end l Super PAC spending set to explode MORE comes next with 5 percent, and 6 percent remain undecided.

The Field Poll found that likely voters in California see both major-party candidates negatively.

Clinton's viewed unfavorably by 53 percent, compared to 47 percent with a favorable opinion. And Trump is viewed unfavorably by 69 percent and favorably by only 31 percent.

The Field Poll/University of California's Institute of Governmental Studies conducted its latest sampling of 1,426 likely voters in California via online interviews from Sept. 7 to Sept. 13. It did not provide a margin of error.

California has not gone to a Republican candidate since 1988, when George H.W. Bush won it en route to the presidency.

Clinton leads Trump by about 1 percentage point nationwide in the latest RealClearPolitics average of polls.