Several 2020 Democratic presidential candidates on Wednesday seized on a newly released memorandum of a July phone call showing 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 expressed hope that Ukrainian President Volodymyr Zelensky could “look into” 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.

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.), one of the primary field’s front-runners and a fierce supporter of impeachment, called the transcript a “smoking gun,” adding that Trump “is in very deep jeopardy.”

This "transcript" itself is a smoking gun. If this is the version of events the president's team thinks is most favorable, he is in very deep jeopardy. We need to see the full whistleblower complaint and the administration needs to follow the law. Now. https://t.co/b56nLZZpRi — Elizabeth Warren (@ewarren) September 25, 2019

“They admit it: Trump pressured the Ukrainian president to work with the U.S. Attorney General to investigate a political opponent. He must be impeached,” added Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.).

They admit it: Trump pressured the Ukrainian president to work with the U.S. Attorney General to investigate a political opponent. He must be impeached. pic.twitter.com/JCjTbaQI8w — Kamala Harris (@KamalaHarris) September 25, 2019

“This is the smoking gun,” echoed former Housing and Urban Development Secretary Julián Castro, adding that Congress should cancel its upcoming recess to begin impeachment proceedings.

This is the smoking gun.



Donald Trump pressured a foreign government to work with his Justice Department to investigate a political opponent.



Congress should cancel recess and begin impeachment proceedings immediately. #TrumpImpeachment pic.twitter.com/yUC0fJW40l — Julián Castro (@JulianCastro) September 25, 2019

Other 2020 Democrats also weighed in on the document, with entrepreneur Tom Steyer Tom SteyerTV ads favored Biden 2-1 in past month Inslee calls Biden climate plan 'perfect for the moment' OVERNIGHT ENERGY: Trump administration finalizes plan to open up Alaska wildlife refuge to drilling | California finalizes fuel efficiency deal with five automakers, undercutting Trump | Democrats use vulnerable GOP senators to get rare win on environment MORE labeling Trump a “traitor” over his request to Zelensky.

There it is. He did it. Donald Trump is a traitor. https://t.co/KcJrK0eQLy — Tom Steyer (@TomSteyer) September 25, 2019

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The five-page memorandum shows Trump asked Zelensky to look into Biden’s role in the firing of a Ukrainian prosecutor who was investigating a natural gas company on whose board Biden's son sat. No evidence has emerged that Biden, who is also a 2020 White House hopeful, was working with his son’s interests in mind.

“There's a lot of talk about Biden's son, that Biden stopped the prosecution and a lot of people want to find out about that so whatever you can do with the Attorney General would be great," Trump said on the July 25 call with his Ukrainian counterpart. "Biden went around bragging that he stopped the prosecution so if you can look into it. ... It sounds horrible to me.”

The memorandum, which is not a verbatim transcript of the conversation, was released a day 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 the House was launching a formal impeachment investigation that was triggered by Trump’s dealings with Ukraine. Democrats have expressed concerns that Trump pressured Kiev into opening a probe into Biden and may have leveraged military aid to do so.

The conversation also led to a whistleblower complaint that expressed alarm over a “promise” Trump made. The White House will provided a copy of the complaint to Congress.