President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE has reportedly been privately criticizing FBI Director Christopher Wray, his own pick to replace former Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE.

Three sources close to the president told NBC News that Trump now includes Wray in his complaints about administration figures whom he suspects of undermining him.

One person told NBC that complaints about Wray often come along with those of Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE, who has been the focus of some of Trump's harshest criticism.

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“[Trump is] in the worst mood of his presidency and calling friends and allies to vent about his selection of Sessions and Wray," the source said.

Since the launch last year of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s Russia investigation, Trump has repeatedly criticized the FBI, the Justice Department and Sessions himself, calling the investigation a “witch hunt.”

Trump fired Comey in May 2017 and has consistently accused the agency of being biased against him, but he has not publicly spoken out against Wray.

Wray has pushed back against Trump’s attacks on the bureau. The president said the FBI’s reputation was “in tatters” last December, after which McCabe called its employees “decent people committed to the highest principles of integrity and respect.”