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) leads 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.) by 11 points in a new poll for the Arizona Democratic primary, while 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.) follows close behind.

In the OH Predictive Insights poll published Tuesday, Biden lead the Democratic field with the support of 29 percent of likely primary voters, while Warren trailed behind at 18 percent. Sanders, the only other candidate to receive double-digit support in the race, came in close behind at 16 percent.

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Biden's lead in the state is regional, according to the poll, which found the former vice president leading populous Maricopa County with the support of 32 percent of likely voters while tying Sanders with 27 percent in Pima County, where Warren sat in third with 13 percent.

In an average of Arizona's 15 other counties, Warren leads the field over Biden and Sanders by single digits.

The wide range of results suggests that Arizona has divided into a three-way race between the top candidates, with others including 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) and 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-Calif.) vying for scraps.

OH Predictive Insights's survey was conducted via an opt-in online panel, which surveyed 900 registered voters including 260 likely primary voters. The margin of error among likely primary voters in the poll is 6.08 percentage points.