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 is neck-and-neck with the top three Democratic presidential primary contenders in Arizona as the state sets itself up to be a key battleground in the 2020 race.

Trump is tied 50-50 among registered voters with 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. 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.) in a new Emerson College poll. He also leads 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.) by 2 points, a margin that falls within the survey’s margin of error.

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No other 2020 Democrat is in head-to-head matchups with Trump, according to the poll.

The president is anchored by an underwater approval rating in Arizona – 45 percent of registered voters approve of the job he’s doing while 50 percent disapprove. However, 50 percent still oppose impeaching him.

Though Arizona hasn’t voted for a Democratic presidential candidate since 1996, Democrats are hoping to build off of changing demographics and Democratic Sen. Kyrsten Sinema’s victory last year to gain momentum in the state and grab Arizona’s 11 electoral votes in 2020.

Arizona voted for Trump over Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE by about 3.5 points in 2016.

The tight matchups in the state represent a prime opportunity for the Democratic Party to expand the electoral map and force the GOP to spend money in a state that has been reliably Republican since the turn of the century.

The Emerson College poll surveyed 901 registered voters from Oct. 25-28 and has a margin of error of 3.2 percent.