Poll: Biden leads Warren by 15 points in California

Poll: Biden leads Warren by 15 points in California
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Former Vice President Joe BidenJoe BidenImpeachment week: Trump probe hits crucial point Trump DACA fight hits Supreme Court Juan Williams: Honesty, homophobia and Mayor Pete 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 WarrenElizabeth Ann WarrenJuan Williams: Honesty, homophobia and Mayor Pete Trump DACA fight hits Supreme Court Democrats on edge as Iowa points to chaotic race MORE (D-Mass.).

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Sen. Bernie SandersBernie SandersJuan Williams: Honesty, homophobia and Mayor Pete Democrats on edge as Iowa points to chaotic race Democrats debate how to defeat Trump: fight or heal 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 HarrisKamala Devi HarrisJuan Williams: Honesty, homophobia and Mayor Pete Democrats debate how to defeat Trump: fight or heal Women who inspired 'Hidden Figures' film will be honored with congressional gold medals 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 YangAndrew YangIntercollegiate athletics just got a two-minute warning AI and automation will disrupt our world — but only Andrew Yang is warning about it The Hill's Campaign Report: Bloomberg looks to upend Democratic race 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.