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's reelection prospects remain unchanged amid the launch of a House impeachment inquiry, according to a new Monmouth University survey.

The poll, which was conducted last week, found that 57 percent of voters polled said it was time for a new president, while 39 percent said Trump should be reelected in 2020.

The results reflected no change from the last Monmouth University Poll survey, which was conducted in August.

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The poll comes after Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight 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 MORE (D-Calif.) announced last week that the House would launch a formal impeachment inquiry amid allegations from a whistleblower that Trump sought to persuade Ukraine to investigate 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, the front-runner for the Democratic presidential nomination.

Trump has since stepped up his attacks against Biden, zeroing in on the former vice president's 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.

The same poll found Biden 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.) with the highest favorability ratings among voters.

Biden has a 46 percent favorable rating and 45 percent unfavorable rating with voters, while Warren has a 42 percent favorable rating and 40 percent unfavorable rating.

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.) came in with the highest unfavorable ratings at 49 percent, compared to a 42 percent favorable rating.

Warren has outpaced Sanders and front-runner Biden in some polls.

The survey from Monmouth University Poll was conducted Sept. 23-29 among 1,161 adults. The margin of error is plus or minus 3.1 percentage points.