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 gaining among independent voters in head-to-head matchups with the Democratic presidential front-runners, according to a new IBD-TIPP poll.

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 leads Trump by just 1 point among independents, which is down from Biden's 18-point lead among the voting group in September.

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In a head-to-head matchup with 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.), 49 percent of independents backed Trump, while 43 percent threw their support behind the senator in the poll, which was released on Monday.

A 4-point gap separated 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.) and Trump, with the president receiving 48 percent support among independents and Sanders garnering 44 percent.

Warren led Trump with independents by 2 points in the September poll, while Sanders led the president by 9 points.

The new poll comes as tensions between Trump and Biden have risen on the campaign trail as the president has intensified his attacks against the former vice president, accusing Biden of efforts to pressure Ukraine to dismiss a senior prosecutor who at one point had investigated an energy company where Biden's son had served as a board member.

There is no evidence that Biden advocated for the prosecutor's removal as a means of protecting his son.

Independent voters will likely play an impactful role in the 2020 general election. Forty-three percent of voters who said they identified as independent said they voted for Trump in 2016, while 42 percent went for Democratic nominee 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, according to the Pew Research Center.

The IBD-TIPP poll was conducted from Sept. 26 to Oct. 3 among 900 adults. The margin of error is plus or minus 3.3 percentage points.