Former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE (D) holds a double-digit lead over the 2020 Democratic primary field in California, according to a new survey.

A SurveyUSA poll released Wednesday found Biden with the support of 33 percent of likely Democratic primary voters in the largest state, compared to 18 percent for his closest competitor, Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.).

ADVERTISEMENT

Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) remained relatively unchanged from his position in the same poll a month before, and now trails Warren by 1 percentage point, well within the poll's credibility interval, after Warren jumped 5 percentage points from her position in September.

Of note in the poll is Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D), California's lone representative in the White House primary, who has slid 5 points since September and 9 points since the poll was taken in August, according to SurveyUSA. Businessman Andrew Yang Andrew YangBiden's latest small business outreach is just ... awful Doctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls MORE had the second-largest slide in the poll, losing 3 points from his position in September.

As with other recent polls, a clear divide was visible in the survey between most of the field and the top-tier candidates: Biden, Warren and Sanders, who were the only three to register double-digit support. Sanders holds a 9-point lead over Harris, the highest-polling candidate in the lower tier of contenders.

Just 8 percent of respondents remained undecided in the poll, suggesting that little support was left to be gained in the state from voters who have not yet selected a candidate.

SurveyUSA's poll contacted 553 likely Democratic primary voters in California between Oct. 15-16 and had a credibility interval of 6.9 percentage points.