Rep. Adam Schiff Adam Bennett SchiffOvernight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings MORE (D-Calif.), the chairman of the House Intelligence Committee, is warning his panel will "undertake additional oversight" of recent changes to the Office of the Director of National Intelligence, including President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE firing the inspector general of the intelligence community.

Schiff raised several issues related to management of the office in a letter sent Tuesday to Richard Grenell, the acting director of national intelligence.

In the letter, Schiff questions the firing of Michael Atkinson. Atkinson, in his position as inspector general, turned over a whistleblower complaint to Congress that led to impeachment hearings into Trump. Trump has railed against Atkinson, saying he “did a terrible job."

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Atkinson on Sunday said he was fired because he "faithfully discharged my legal obligations as an independent and impartial Inspector General."

Read Schiff's full letter below.