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 on Saturday took aim at a second unnamed intelligence official who is reportedly considering filing a complaint against him and testifying before Congress about Trump's contacts with Ukraine's president.

Trump tweeted that the official, whose identity remains a secret, is a member of the "Deep State" he has argued is working to undermine his presidency.

"The first so-called second hand information 'Whistleblower' got my phone conversation almost completely wrong, so now word is they are going to the bench and another 'Whistleblower' is coming in from the Deep State, also with second hand info. Meet with Shifty. Keep them coming!" Trump tweeted.

The first so-called second hand information “Whistleblower” got my phone conversation almost completely wrong, so now word is they are going to the bench and another “Whistleblower” is coming in from the Deep State, also with second hand info. Meet with Shifty. Keep them coming! — Donald J. Trump (@realDonaldTrump) October 6, 2019

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Trump's mention of "Shifty" Rep. Adam Schiff Adam Bennett SchiffSchiff to subpoena top DHS official, alleges whistleblower deposition is being stonewalled Schiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power MORE (D-Calif.), chairman of the House Intelligence Committee, appeared to be a reference to Republican efforts to discredit House Democrats' impeachment inquiry as well as the first whistleblower who raised concerns about Trump's conversations with Ukrainian President Volodymyr Zelensky.

Republicans have argued that the first whistleblower, who met with a member of Schiff's congressional staff before filing a complaint, is a partisan operative who did not have firsthand knowledge of Trump's conversations.

Democrats argue that a readout of Trump's July phone call with Zelensky, during which he repeatedly asked the Ukrainian leader to open an investigation 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, proved the whistleblower's concerns to be true.