All three of the top 2020 Democratic primary contenders hold leads over 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 in a new poll of Pennsylvania voters.

In a poll released Thursday by Muhlenberg College and Morning Call, 57 percent of registered voters said that Trump definitely does not deserve to be reelected in 2020.

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When it came to head-to-head matchups, 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 led the president by 9 percentage points (52-43), while Sens. 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.) and 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.) both led Trump by 5 percentage points (50-45).

Just over half of voters in the poll, 51 percent, said that they approved of the House's impeachment inquiry, while 47 percent were opposed to it. 49 percent said that the president could not be trusted.

On whether the House should vote to impeach the president based on the evidence made public so far of his efforts to persuade Ukraine's government to open an investigation into Biden, 49 percent said yes, while 47 percent said no.

Muhlenberg College/Morning Call's survey contacted 410 registered Pennsylvania voters between Nov. 4-9, and had a margin of error of 6 percentage points.