President Donald Trump lashed out on Sunday against Jennifer Williams, a foreign policy aide to Vice President Mike Pence who has become the latest impeachment inquiry witness to be targeted by the president’s ire.

“Tell Jennifer Williams, whoever that is, to read BOTH transcripts of the presidential calls, & see the just released ststement (sic) from Ukraine,” he tweeted. “Then she should meet with the other Never Trumpers, who I don’t know & mostly never even heard of, & work out a better presidential attack!”

Tell Jennifer Williams, whoever that is, to read BOTH transcripts of the presidential calls, & see the just released ststement from Ukraine. Then she should meet with the other Never Trumpers, who I don’t know & mostly never even heard of, & work out a better presidential attack! — Donald J. Trump (@realDonaldTrump) November 17, 2019

Offering a non-defensive response to Trump’s tweet, Pence’s spokesperson told CNN, “Jennifer is a State Department employee.”

On Saturday, House lawmakers released a transcript of Williams’ testimony on Trump’s July 25 phone call with Ukrainian President Volodymyr Zelensky, which is at the heart of impeachment proceedings. A rough transcript of the call shows Trump sought Zelensky’s help with a corruption probe of former Vice President Joe Biden and his son Hunter, based on unsubstantiated allegations.

Earlier this month, Williams told Intelligence Committee members that the conversation on which she listened in, “struck me as unusual and inappropriate.”

24 PHOTOS First public hearings of Trump's impeachment inquiry features two veteran diplomats testimony See Gallery First public hearings of Trump's impeachment inquiry features two veteran diplomats testimony Career Foreign Service officer George Kent, left, and top U.S. diplomat in Ukraine William Taylor, right, are sworn in to testify before the House Intelligence Committee on Capitol Hill in Washington, Wednesday, Nov. 13, 2019, during the first public impeachment hearings on President Donald Trump's efforts to tie U.S. aid for Ukraine to investigations of his political opponents. (AP Photo/(AP Photo/J. Scott Applewhite) Top U.S. diplomat in Ukraine William Taylor, and career Foreign Service officer George Kent, both to the right, are sworn in before they testify before the House Intelligence Committee on Capitol Hill in Washington, Wednesday, Nov. 13, 2019, during the first public impeachment hearing of President Donald Trump's efforts to tie U.S. aid for Ukraine to investigations of his political opponents. Committee members are seated left. (AP Photo/Alex Brandon, Pool) Top U.S. diplomat in Ukraine William Taylor, left, and Career Foreign Service officer George Kent are sworn in prior to testifying before the House Intelligence Committee on Capitol Hill in Washington, Wednesday, Nov. 13, 2019, during the first public impeachment hearing of President Donald Trump's efforts to tie U.S. aid for Ukraine to investigations of his political opponents. (Jim Lo Scalzo/Pool Photo via AP) Top US diplomat in Ukraine William Taylor testifies before the House Intelligence Committee on Capitol Hill in Washington, DC on November 13, 2019, during the first public impeachment hearing of President Donald Trump's efforts to tie US aid for Ukraine to investigations of his political opponents. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by Andrew CABALLERO-REYNOLDS / AFP) (Photo by ANDREW CABALLERO-REYNOLDS/AFP via Getty Images) WASHINGTON, DC - NOVEMBER 13: Ranking Member Rep. Devin Nunes (R-CA) (L), speaks with Rep. Jim Jordan (R-OH) (C), and Republican Counsel Steve Castor during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into U.S. President Donald Trump on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Saul Loeb - Pool/Getty Images) Democratic Counsel Daniel Goldman asks questions of witnesses US Ambassador to Ukraine William Taylor and Deputy Assistant Secretary George Kent during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into US President Donald Trump, on Capitol Hill in Washington, DC, November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by SAUL LOEB / POOL / AFP) (Photo by SAUL LOEB/POOL/AFP via Getty Images) Top US diplomat in Ukraine William Taylor testifies before the House Intelligence Committee on Capitol Hill in Washington, DC on November 13, 2019, during the first public impeachment hearing of President Donald Trump's efforts to tie US aid for Ukraine to investigations of his political opponents. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by Olivier Douliery / AFP) (Photo by OLIVIER DOULIERY/AFP via Getty Images) WASHINGTON, DC - NOVEMBER 13: Democratic Counsel Daniel Goldman questions top U.S. diplomat in Ukraine William B. Taylor Jr. as Chairman Adam Schiff (D-CA) (R), Rep. Jim Himes (D-CT) (L) and Rep. Denny Heck (D-WA) listen during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into U.S. President Donald Trump on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Saul Loeb - Pool/Getty Images) Chairman Adam Schiff, Democrat of California, speaks during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into US President Donald Trump, with witnesses Ukrainian Ambassador William Taylor and Deputy Assistant Secretary George Kent testifying, on Capitol Hill in Washington, DC, November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by JIM LO SCALZO / POOL / AFP) (Photo by JIM LO SCALZO/POOL/AFP via Getty Images) Republican Representative from California Devin Nunes (L) and legal counsel Steve Castor (R) listen to Charge d'Affaires at the US embassy in Ukraine Bill Taylor during the House Permanent Select Committee on Intelligence hearing on the impeachment inquiry into US President Donald Trump, on Capitol Hill in Washington, DC,on November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by JIM LO SCALZO / POOL / AFP) (Photo by JIM LO SCALZO/POOL/AFP via Getty Images) US Representative Jim Jordan (R), Republican of Ohio, attends the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into US President Donald Trump, with witnesses Ukrainian Ambassador William Taylor and Deputy Assistant Secretary George Kent testifying, on Capitol Hill in Washington, DC, November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by SAUL LOEB / POOL / AFP) (Photo by SAUL LOEB/POOL/AFP via Getty Images) WASHINGTON, DC - NOVEMBER 13: Shadows cover a Boston Globe front page headline stating "THE CASE TO IMPEACH, FOR ALL TO HEAR" posted at the Newseum on November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Mark Makela/Getty Images) WASHINGTON, DC - NOVEMBER 13: Rep. Jim Jordan (R-OH) listens during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into U.S. President Donald Trump, with witnesses top U.S. diplomat in Ukraine William B. Taylor and Deputy Assistant Secretary for European and Eurasian Affairs George P. Kent testifying, on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Saul Loeb - Pool/Getty Images) WASHINGTON, DC - NOVEMBER 13: House Intelligence Committee Chairman Adam Schiff (D-CA) speaks during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into U.S. President Donald Trump on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Saul Loeb - Pool/Getty Images) Chairman Adam Schiff (L), Democrat of California, and Ranking Member Devin Nunes (R), Republican of California, during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into US President Donald Trump, with witnesses Ukrainian Ambassador William Taylor and Deputy Assistant Secretary George Kent testifying, on Capitol Hill in Washington, DC, November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by SAUL LOEB / POOL / AFP) (Photo by SAUL LOEB/POOL/AFP via Getty Images) WASHINGTON, DC - NOVEMBER 13: Top U.S. diplomat to Ukraine, William B. Taylor Jr. (C) listens to opening statements before providing testimony to the House Intelligence Committee in the Longworth House Office Building on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are making a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate political rivals in exchange for military aid and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Drew Angerer/Getty Images) George Kent, the deputy assistant secretary of state for European and Eurasian Affairs looks on during the impeachment inquiry into US President Donald Trump in Washington, DC on November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by Andrew CABALLERO-REYNOLDS / AFP) (Photo by ANDREW CABALLERO-REYNOLDS/AFP via Getty Images) WASHINGTON, DC - NOVEMBER 13: Charge d'Affaires at the US embassy in Ukraine Bill Taylor (L) and Deputy Assistant Secretary of State for Europe and Eurasia George Kent (R) are sworn in to testify before the House Permanent Select Committee on Intelligence hearing on the impeachment inquiry into US President Donald J. Trump, on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump.(Photo by Jim Lo Scalzo-Pool/Getty Images) George Kent, the deputy assistant secretary of state for European and Eurasian Affairs looks on during the impeachment inquiry into US President Donald Trump in Washington, DC on November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by Andrew CABALLERO-REYNOLDS / AFP) (Photo by ANDREW CABALLERO-REYNOLDS/AFP via Getty Images) WASHINGTON, DC - NOVEMBER 13: Deputy Assistant Secretary for European and Eurasian Affairs George P. Kent testifies before the House Intelligence Committee in the Longworth House Office Building on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Chip Somodevilla/Getty Images) WASHINGTON, DC - NOVEMBER 13: Deputy Assistant Secretary for European and Eurasian Affairs George P. Kent testifies before the House Intelligence Committee in the Longworth House Office Building on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Chip Somodevilla/Getty Images) WASHINGTON, DC - NOVEMBER 13: Members of the media work as top U.S. diplomat in Ukraine William B. Taylor Jr. and Deputy Assistant Secretary for European and Eurasian Affairs George P. Kent testify before the House Intelligence Committee in the Longworth House Office Building on Capitol Hill November 13, 2019 in Washington, DC. In the first public impeachment hearings in more than two decades, House Democrats are trying to build a case that President Donald Trump committed extortion, bribery or coercion by trying to enlist Ukraine to investigate his political rival in exchange for military aide and a White House meeting that Ukraine President Volodymyr Zelensky sought with Trump. (Photo by Chip Somodevilla/Getty Images) Ukrainian Ambassador William Taylor (C-L from back) and Deputy Assistant Secretary George Kent (C-R from back) testify during the first public hearings held by the House Permanent Select Committee on Intelligence as part of the impeachment inquiry into US President Donald Trump, on Capitol Hill in Washington, DC, November 13, 2019. (Photo by SAUL LOEB / POOL / AFP) (Photo by SAUL LOEB/POOL/AFP via Getty Images) George Kent, the deputy assistant secretary of state for European and Eurasian Affairs and Ukrainian Ambassador Bill Taylor(front), the top diplomat in the US embassy in Ukraine arrive in the impeachment inquiry into US President Donald Trump in Washington, DC on November 13, 2019. - Donald Trump faces the most perilous challenge of his three-year presidency as public hearings convened as part of the impeachment probe against him open under the glare of television cameras on Wednesday. (Photo by Olivier Douliery / AFP) (Photo by OLIVIER DOULIERY/AFP via Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

She described the discussion as “more political in nature” than Trump’s communications with other foreign leaders, noting that he was concerned with his “personal political agenda.”

The call, which occurred while American military aid was being withheld from Ukraine, has raised questions over whether Trump was attempting to broker a quid pro quo while soliciting interference in the 2020 election to handicap his Democratic rival.

Trump has already bashed other impeachment witnesses, including former U.S. ambassador to Ukraine Marie Yovanovitch who hadn’t even left Friday’s hearing before he assailed her decadeslong career online.

In a tweet, Trump claimed that “everywhere” she “went turned bad.” Yovanovitch, responding in real time, called the rebuke “intimidating.”

Speaking to reporters, Intelligence Committee chair Rep. Adam Schiff (D-Calif.) characterized Trump’s remarks as “witness intimidation.”

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