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 and 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.) are tied for first place among Democratic primary voters in California, while home-state 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) is running in a distant fifth, according to a new poll.

The Emerson University survey released Tuesday shows Biden and Sanders leading the pack in California with 26 percent support each, followed by 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.) at 20 percent. No other candidate secures double-digit support in the poll.

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Tech entrepreneur and political newcomer 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 notches 7 percent support in the survey, with Harris following at 6 percent support.

Former Rep. Beto O’Rourke (D-Texas) and South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE (D) took sixth and seventh place in the poll with 5 percent and 4 percent support, respectively.

The survey is a sign that Harris may face a difficult battle in her home state’s nominating contest, a delegate-rich election that carries more significance than ever because of an accelerated primary schedule that places it on Super Tuesday, when voters in a dozen states will cast their ballots for the Democratic nomination.

“Senator Kamala Harris is in trouble in her home state. If she is unable to gain momentum in Iowa or New Hampshire, come Super Tuesday she might have a similar fate to Sen. Marco Rubio Marco Antonio RubioGOP lawmakers distance themselves from Trump comments on transfer of power McConnell pushes back on Trump: 'There will be an orderly transition' Graham vows GOP will accept election results after Trump comments MORE in 2016, when he was unable to win his home state of Florida and dropped out of the race,” Emerson Polling Director Spencer Kimball said, referring to Rubio’s 2016 loss to President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE in Florida’s Republican presidential primary.

In fact, no recent presidential candidate who lost his or her home state in a primary has gone on to win their party’s nomination.

Sanders’s support in the Golden State is driven primarily by voters under the age of 50. Among those voters, the Vermont senator carries 34 percent support, according to the Emerson poll. Warren takes 18 percent among that group, while Biden trails with 16 percent.

But Biden enjoys strong support with older voters. Among those over the age of 50, the former vice president notched 40 percent support. Warren received 23 percent among that group, while Sanders scored 13 percent.

While the poll shows Warren running in third place in California, it also suggests that her support may be shakier than her fellow top-tier candidates in the state.

Only 31 percent of respondents who picked Warren as their first choice said they would definitely vote for her in the primary. Among those that said they would support Sanders or Biden, 67 and 59 percent respectively said that they would stick with their candidate of choice.

The Emerson poll surveyed 424 registered Democratic voters in California from Sept. 13 to 16. It has a margin of error of plus or minus 4.7 percentage points.