Poll: Trump gains among independents against Biden, Warren

President TrumpDonald John TrumpZuckerberg launches public defense of Facebook as attacks mount Trump leaning toward keeping a couple hundred troops in eastern Syria: report Warren says making Israel aid conditional on settlement building is 'on the table' 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 BidenJoe BidenZuckerberg launches public defense of Facebook as attacks mount Graham: 'Stupid' for Trump to ask China to investigate Biden Romney: Republicans don't criticize Trump because they fear it will help Warren 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 WarrenElizabeth Ann WarrenZuckerberg launches public defense of Facebook as attacks mount Warren, Yang fight over automation divides experts Warren says making Israel aid conditional on settlement building is 'on the table' 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 SandersBernie SandersWarren says making Israel aid conditional on settlement building is 'on the table' Warren says she will unveil plan to finance 'Medicare for All' Ocasio-Cortez says endorsing Sanders early is 'the most authentic decision' she could make 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 ClintonHillary Diane Rodham ClintonClinton trolls Trump with mock letter from JFK to Khrushchev Trump-Graham relationship tested by week of public sparring Sunday shows — Mulvaney seeks to tamp down firestorm over quid pro quo comments, Doral decision 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.